Google AdSense is a great program in theory and what it states on its sites. Although it is the highest paying out there, there are shady internal practices going on. According to a leak from an ex-Google employee who worked at the AdSense department, they had plans. The famous people would never be banned. The rising stars (that were not that famous to affect them) would be banned right before their payout day. And so Google would take their money. This has happened to many, many people. All they say to the publisher is that there was "Invalid Activity" detected, and nothing else. No evidence provided whatsoever and they do not elaborate. For those who send an appeal to Google, they would get rejected automatically with the same automated email reply. Other reasons would be blaming the publisher for incentivizing users to click on the ads shown. Here's a link to the lead:
http://pastebin.com/qh6Tta3hJust search it up. For example, a 19 year old lost $46,000.00 USD. A Google employee had emailed him a few days before his ban, wanting to help him increase his revenue. Then they banned him. Here's a link to the article:
http://www.businessinsider.com.au/19-year-old-lost-46000-in-google-adsense-rules-ban-2014-8?r=US&IR=TMore information:
http://www.fairsearch.org/is-google-stealing-from-adsense-publishers/http://www.cnet.com/news/new-lawsuit-accuses-google-of-adsense-fraud/http://marketingland.com/recent-bans-surface-adsense-publishers-complaints-about-google-5569http://kotaku.com/5964998/banned-from-making-money-these-youtubers-share-their-storiesThat should give you the idea of what is actually happening with Google AdSense. That is just one of the many reasons why a lot of publishers tend to move away from Google AdSense nowadays, and to other services instead, even though they may offer a lower payout.