I don't know where else to put this, but I just took the 35 credit opinion survey and got all the way to the end and put in a nicely written opinion that I really thought about and it took me about 15 minutes, which isn't long, but when it freezes at the end and doesn't credit you with the time, it's severely frustrating.
I understand that you really just want people to spend their money on the site directly, but it's nice to have some added, bonus, free credits too. There's obviously some bug as when I was finished, the screen went a weird opaque color where it was kind of semi-transparent and stuck there for 30 minutes. I never got credit for it. It's not a lot, but it's the principle of all of it. So yes, it sucked.