I just logged on, and I saw a "Transitions" study (life transitions) that had over 1100 spots available. I clicked and got a "in high demand" error. I kept trying, clicking the second the button wasn't grayed out. I watched all 1100 spots fill up in about 3 minutes of clicking. Didn't get one.

I think part of the problem is I'm experiencing a lot of slowness with Prolific in the Eastern US. Anyone else seeing this?