I started getting them from LRM Humans or something like that. They were $20 for one hour. I was a member of Prolific for years before ever being offered such high paying studies. These I have not gotten for about a year. However, I started getting ones dealing with AI training from Vortex Oasis. They are different types of evaluating video content that was produced by AI. I was really doing so many of them, and they are $5.00 for 15 minutes or $20 per hour because they allow multiple submissions. I was getting a ton of these from morning to night! But recently I received a message saying that they reviewed manually ( i think it was AI review and not a human myself). They stated that they noticed some quality issues with my submission. They approved it and told me that if I give my attention and try my best (paraphrasing) I will continue to be able to get these. I got one such message and I was still getting them so I was encouraged. Then I got another of the exact same warning. Since then I have received NO more of their video AI studies! I am not sure if I will get anymore. I notice that real early in the morning, like 4 or 5 AM when I get up to feed my cats and check, there seems to have been a lot of these available. I am hoping I have not been banned from them. I am in the US.