Prolific Academic just announced a new referral program!

So first of all, if you haven't heard of Prolific Academic (ref | non-ref) yet, it's a great survey site. You get paid pretty well to complete academic surveys of various lengths. I've made more than $50 over the past year or so, just by occasionally completing a survey. Most take 15 minutes or less, but there are some lengthier ones sometimes. Minimum payout is £5 through paypal, I believe, but if you withdraw £20 or more at once there are no fees.

Anyway, they've already had a referral program for a while where you get 10% of your referrals' first cashouts, but now they've just announced another program. If you refer somebody who creates a study with at least £50, they get £10 of free credit towards that survey and you get £20 (almost $30) added to your account!

This site was already my favorite survey website, with lots of actually interesting surveys (a few I've taken were just webgames!), but now they've made it even better! I'd highly recommend signing up if you like making some easy money while helping people with their research!

EDIT: If anyone is wondering, paypal automatically converts to your local currency when you withdraw. The fees are pretty negligible, especially if you withdraw £20 or more at once.