Dating and Polyamory
There are many sites online these days for dating, but not many for niche dating, like sites for people who have what is called "alt life" or alternative lifestyles. I have seen many groups on Facebook for people all over the world who are into certain relationships, separated in small groups. But upon visiting those groups I didn't see a feasible way to view any kind of profile or find people based on what you're looking for. Then I saw a site called www.BeyondTwo.com that someone posted in one of the polyamory groups.
I like that BeyondTwo.com has people from all over the world joining. Just today I was messaging with people from Venezuela, India and Chile, interested in polyamory but didn't know where they could go to find more like-minded people. At least three people from India have told me that because their country is so strict, they are willing to relocate. Because poly people are so few and far between compared to the rest of the single population pool, you are really limiting yourself by restricting your search to a specific region. The best way to find what you're looking for is to expand the search, sometimes outside your country.
The profile on BeyondTwo.com is extensive, as it covers very specific things