Used them a few times via FireFaucet (via TimeWall and other survey platforms) to get credits to trade for BTC.

Slight problems initially but nothing major enough to stop me using it - lots of personal medical questions (if you or someone you care for has ever had cancer or some obscure illness, etc). If you keep answering these questions, yes they do pay out, hence the 2 stars. However, I've had multiple instances where I get maybe 3/4 of the way through the time bar at the top, only for the survey to abruptly end without any payment. Then if I return to the page later, the time has gone. I figure it is what it is. I go back and sometimes it still has the time, but most of the time it disappears. Then, I try another one today, and suddenly, after giving one of my email addresses, my account gets blocked with zero warning or explanation.

Be careful with the information you give this one. If you do want to do surveys, always pick ones with low time requirements. 30 minutes at the top bar is impossible to do without being redirected. 8 minutes seems to be the sweet spot, but most of the time, you just lose time for nothing in return. There are far, far better platforms out there than this one. My 2 star review is being extremely generous and I only gave them 2 stars because they have paid me in the past.