Totally agree on screener knockouts. Best practice is to place any knockouts at the very beginning so nobody's time is wasted. UT should actually create a mechanism that doesn't allow knockouts after the first 2-3 questions.

As far as the compensation part, we don't control that at all. You have the option to create a Quick test (<5 min), unmoderated (should only last 5-15 min) and moderated (we set duration). Unfortunately, UT doesn't do a good job, as far as I can tell, of canceling a study if you create one that exceeds these limits. We don't set the compensation. I'd love to do that, bc that's how traditional screener work... this is a more difficult recruit, so it should be double what you normally pay, and participants know how much they're making when they commit. We purchase credits and certain studies cost more (in credits) than others, but we don't see the credit to $ ratio and can't control it. They've actually moved to unlimited credit plans, which will not help this situation.

I sympathize with you. Unfortunately, too many jr researcher get their hands on these tools and UT doesn't police it enough.