Does Google Bans to Put the Adsense Code in Signup Page? Thanks in Advance... Please share your Experience
This is the rule: https://www.google.com/adsense/support/bin/answer.py?answer=48182 As long as there is content on the Signup Page other than just the form, then it's probably OK.
I think it's against the ToS to put it there but besides that, putting an adsense in your sign up page won't help you unless you actually have content there and people click through. Otherwise you are just inflating your own impressions and lowering overall CTR. I would just not put it on the sign up page unless you have targetted content there. But no, Google won't ban you for that, I don't think so.
Ya, it's probably better to remove it from the sign up pages due to lack of content. I don't think it would be worth the risk (how often is that page visited?).