I heard about User Testing through a YouTube video at the end of December. I signed up and have already made several hundred dollars in just two months. It's great if you speak more than one language because then you receive more tests, so although I don't match with a lot of the tests that come through, I still get enough matches for it to be worth my time. I will have to inform the ministry of finance about my testing as I'm about to make over the yearly threshold for a second job and will have to start paying tax on my earnings! Honestly so happy I found out about it. I definitely recommend it to anyone who has time to sit in front of their computer and wait for potential tests to come through :)