Perk is a party of services that pay you to watch videos, take quizzes and surveys, download apps, go shopping, search the web and more.
The mobile apps include PerkTV, Perk PopQuiz, Perk Search, Perk Wallet, PerkScreen and Perk Browser. PerkTV, PopQuiz, PerkScreen and Wallet are the only ones currently available for Australians, but if you use perk.com you effectively get a combination of Search/Browser/Screen apps all in one page.
I found PerkTV through the Reddit /r/beermoney thread, which I thoroughly recommend reading. They also have a dedicated /r/PerkTV thread, which is an interesting read. Scrolling through beermoney was the inspiration behind starting this blog, as there seems to be a dearth of information devoted to helping Australians finding extra income, especially of the passive kind.
That's the great thing about PerkTV - the fact that you can leave it running on your iOS or Android phone 24/7 with very little monitoring. It uses very little power at the wall, and if you dim the screen on your device, is apparently fine for your battery. You can have 5 phones per account (and it's recommended not more than 5 phones per household, as Perk may arbitrarily ban multiple users who have been using the same IP address.) Australian users receive 2 points per 2 videos watched, which is sadly half of our US counterparts.
The trick to earning thousands of points per day is downloading apps to your Android phone/tablet, and/or answering surveys. All you have to do is download the apps and run, and they're typically free and can be deleted as soon as you've received your points.
An alternative is Perk PopQuiz. Pick a subject you know well, and set it to Lightning Round Mode (bar on the left). It gives you half the time to answer the questions, but you receive bonus points - 5 points instead of 4 if you get them correct. This means instead of waiting 2+ minutes for your 2 points for watching trailers, you can get 5 points in 2 minutes (or less, factoring in loading time and the 20-30 seconds of advertisements).
I haven't calculated the amount of points my perk farm is currently earning (5 phones), but it's roughly 1400 per day mainly just running the perktv app. So, roughly 9800 points per week, which equates to a $5 paypal gift card or if you can squeeze in 200 more points (definitely achievable) you could get a $10 Amazon giftcard.
The problem Australians run into is that most of the giftcards available on rewards are specific to America. You can opt for paypal payouts in USD (ie $5.80= 9000 points), or go to a giftcard exchange such as this one to swap your other gift card voucher numbers for Paypal payouts.