A little follow-up on this. now i know nothing about how scam sites work and I'm just conspiracy theorying this, but I looked up what people are saying about this site in order to do some research and here's what I found so far.
THE TL;DR: ArtWisher is 100% a scam site and you probably shouldn't even go on there. Absolutely don't give them your personal information.
It is likely not safe to buy from there (NOR SHOULD YOU BE DOING IT in the first place, but it is very likely not safe to begin with)
You should probably not be going on the site to begin with
and you probably shouldn't go on there to submit a takedown request.
I didn't go on the site myself (and I recommend against going) but from all the screenshots I've seen so far, some things stick out to me.
First off, the website and/or some of its search results seem to be blocked based on your region, IP, or something else. What you find on there seemingly varies on device.
Second, the site seemingly has two clone sites that have a different name, but are otherwise nearly identical down to the cheap "we love art etc and so on buy some cool art" flavor text that they have on the front page. If it wasn't sketchy before, then it's definitely sketchy now. There is no way it's any kind of legit business.
Now to the point of the actual art theft. This site (or these sites, but basically this site) steals art from literally everyone. Not picking and choosing much. There's youtube thumbnails, stuff from Twitter, stuff from Tumblr. There doesn't seem to be quality control. (Why else would they have my literal sketch dump on there about visually upsetting squid people.)
I doubt anyone making a site that they intend to last would do this. Even the dumbest stolen art site owner should know how fast word of mouth about art theft spreads online, especially when a lot of the ripped art is watermarked and can be traced back to the artist immediately, on a site where 99% of the art is OBVIOUSLY stolen due to being stuff like sketches and youtube thumbnails and memes, and I've even seen like, photos of people.
If you look up at the screenshot taken of the site, you'll notice that literally all the art on there is "discounted". Even then it's all highly priced. It's pretty obvious that they're not actually discounted, there's just a higher fake price attached to fool the customer to think the regular price is a good deal and make them more likely to buy. I've seen several screenshots of stolen art and to my knowledge literally EVERYTHING on that site is "discounted".
I haven't seen any reports of anyone buying from here (WHICH IS GOOD) but supposedly there are what are very likely fake reviews on the site. Considering that I've never heard from this site before and everything I've seen from it has been posted in the past few days, I have to assume the site is pretty new. Again, I doubt it's actually trying to be an art selling site. I would go far enough to doubt that they're even producing any of the things they're pretending to sell. I would mark this down as a phishing site that you should never ever give your payment information to; OR YOUR E-MAIL ADDRESS for that matter.
Again I have no idea how scam sites work, but trying to think this one through - there is ZERO WAY that anyone would be dumb enough to try to run an actual art site like this. It will be in legal trouble week one. If it's not to make a quick buck, it's to fish for personal information of people who browse and try to buy, and the artists trying to get their art taken down.
Judging from them stealing art more or less from everybody, even small artists, even YOUTUBE THUMBNAILS that come on why would that sell ever. There should be a risk-reward ratio there, and stealing art from big- and small artists and everyone under the sun is not profitable in ANY SENSE because that just means a maximum amount of people trying to take you into court. Longevity is NOT THE THING HERE. What does stealing from a maximum amount of people actually achieve though?
Talk. It makes a whole lot of people on the internet talk about you, your site, and how horrible it is. Having stolen art from a hundred artists will have a few of those artists find out, post a PSA, and that PSA will spread and now five hundred people have opened your site to see if their art is on there and spread the word forward. And that number will grow.
I suspect that's what their actual strategy is. Clearly a site like this will not be long-lived, but it will incite panic within artists whose art is up for sale, even if no real people are buying it. And that drives exponential traffic to the site even if the site was unknown beforehand! More people will learn about the site and go see if their art is up for sale, and if it is, you might file a takedown request on the site... with your personal information.
From what I've heard, all that filing a takedown request on this site actually achieves is that you will become blocked from viewing the site. That, plus the scam site now has your e-mail/name/whatever they want you to provide. Again, I haven't been on the site, so I don't even know if they have a takedown request form or if you have to e-mail someone directly. Either way that's giving personal information to a clearly malicious site with several clones of itself.
Furthermore, the artist community driving traffic to the site in order to look for their art is bad. It's worse when your art actually is there, and you tell people to check if their art is there (NOTE! LIKE I DID IN THE ORIGINAL RESPONSE BECAUSE IT'S A VERY BUILT-IN AUTO RESPONSE IN SITUATIONS LIKE THIS!). Because of course, that drives MORE PEOPLE TO GO SEARCH FOR/AND ON THE SITE, and the name of the site even spreads via word of mouth.
Now I don't know how Google/search engines in general work but it's my understanding that a site getting a lot of traffic is generally an algorithmically VERY GOOD THING! Which should mean that the more people link to, search, or just go to this site to browse, the more daylight the site will see which might get it more traffic from people outside the artists who already hate and loathe it. That involves people who have no idea it's a scam site and are actually online shopping for art. I don't know if this is how it actually works, but if their strategy is to cause mass outrage by stealing from literally everyone and growing their site traffic exponentially overnight to get in a maximum amount of phishing done before the site is nuked due to the guaranteed incoming lawsuits and/or shutdown, it's upsettingly smart.
Either way I'd like to stress: DO NOT GO ON THE SITE. Submitting copyright complaints to the site owner will likely do absolutely nothing and be harmful at best. With how many people are talking about this site right now, I doubt it (or, as there's two clone sites, they) will stay up very long. I already addressed this in the original response, but making a direct report to CloudFlare is likely the effective way to report stolen art (probably). It will also require you to go on the site unfortunately. I don't know how any of the report stuff works so if anyone else has experience on whether it's a good bet, maybe add?
I'd also like to end this off with "this is just a theory". I do feel like it makes a decent amount of sense and if it's all bullshit then at least the following is true: the site is a SCAM. Period. I would advise against treating this as an "art selling site"; it is a SCAM SITE.