I was checking out the Adsense forum ,and ppl there are crying for their adsense account has been banned for invalid clicks. Google says that this money is returend back to the advertiser. So, I was just wondering that how many of you have had that experience ? Did you ever got your money back by google, saying that this is reimbursement from the banned account / invalid clicks ?
Google discounts fraudulent clicks and issues refunds when it's needed. Good info here: http://adwords.google.com/support/bin/answer.py?hl=en&answer=6114 - following the links on that page will lead to other related info as well.
I get reimbursed quite frequently. Once every 5 days or so Google credits $5 - $10 back to my account for "Click Quality" I usually get around $50/month back for invalid clicks.