You don't have to sign up for all of the offers, just those that interest you. If you don't want any just select "No" and then the Continue/Next button or you can just click the "Skip" button if the page has one (don't need to click yes/no for the pages w/ skip unless you want to say yes to an offer).

Have you tried a new email address? Make sure your cookies are set to "Accept". Not clearing cookies too soon after doing an offer and making sure to click on the confirmation email?

If you haven't read them yet there are some good stickies at the tops of the Forum w/ ideas on how to do offers. (ETA - What Catherine posted while I was typing. I think she should get the "Most helpful answering offer questions" award!)

Good luck!