Maybe I don't leave the windows open long enough? They are driving me nuts because I'm not getting credit. I may be impatient and not able to recognize it. Then, again, I've wondered if they are 'corrupted.'
The ONLY current PuzzBuzz and the like offer that I've clicked on recently that I CANNOT get to credit is the DC/Marvel comics quiz. I've done it at least 9-10 times and it simply won't credit. It was a learning curve for me, but I did discover that most of them will credit (for me, at least) if I leave the window open until a thing pops up saying something to the effect of "You haven't received your reward", when that happens, it's usually credited.
Except the comic books quiz. And it WOULD be that one, I'm not a comic book fan.