Prolific doesn't care how many approved submissions you've made.
This isn't a retaliatory post either; I still see the AI studies, but just letting you all know they really don't care how many good submissions you've made. I am also aware of the approved submissions vs. rejection = account hold ratios that exist, but that's not the point of this post.
Prolific is also not a "job", it is a gig and it's apparent that this is not obvious to every participant. You are replaceable to them. They are reporting higher profit than ever as well as more active users than ever. You are not important to them; it costs them basically nothing except their scripted onboarding process and identity checks to have a new user sign up, so please just keep that in mind.
You might be thinking "hey all participants already know this", but if you try typing the keywords "not fair" or "unfair" into the subreddit search bar, you'll see many posts with comments like that, showing implication that they deserve something other than just the $ for finishing the study or being screened out.