I didn't engage in illegal activities, malicious or deceptive practices, hate speech, harassment, distributing personal information, child exploitation, spam, ranking manipulation, distribution of sexually explicit material, violence, selling regulated goods and services, impersonation, account hijacking, or use multiple accounts to bypass the above policies. So I have no idea what I did -- Google won't say, and all attempts to get more info out of them failed.
Here's the closest thing to a list of reasons I could find: https://www.google.com/intl/en-US/%2B/policy/content.html
I didn't engage in illegal activities, malicious or deceptive practices, hate speech, harassment, distributing personal information, child exploitation, spam, ranking manipulation, distribution of sexually explicit material, violence, selling regulated goods and services, impersonation, account hijacking, or use multiple accounts to bypass the above policies. So I have no idea what I did -- Google won't say, and all attempts to get more info out of them failed.