Driverdan, maybe you're right... but what about the "featured tweets" from Twitter? They are bulk, unsolicited and adv messages... You're a spammer if you don't pay? Otherwise if you're Twitter you can do everything? Just to understand...
Anyway I submitted an inquiry to Twitter, but I don't think they will reply... They told too many mentions.. but I don't think that 300 mentions in 2 days with other tweets in the between are too much.. really... (I don't think I'm the top mentioner guy...)