I don't get it always either.

I'm only getting one offer to credit a day, and I try to do at least 3-5/day.

I'm with you on the spam, so I'm not sure what is going on. I clear my cookies out first thing each morning and then hit the offers.

One thing I am NOT sure about is how far to go on some of them. Are they simple e-mail submits or do you have to click through all the yes/no pages??