My site, YouTube-Promos, was banned from Google Adwords after several months of $100 / month of ads. It is a site in direct competition with YouTube, thus Google, but why was it banned, it does not break any of the landing page rules, as far as I can tell. Is there any way to get this undone? Is it just about sending an email to the right person? Or what?
"It is a site in direct competition with YouTube" I don't think so. Your site games youtube views, comments and devalues the youtube site in general. It should be clear why they banned you and they were right in doing so.
No, my site sells promotions, you can think of me as an advertising company for your YouTube videos, I am doing nothing more than advertising a video.
Have you tried contacting google or anything? I suggest dropping them a phone call or email. They're the only people who can give you a definite response. Good luck