This was the explanation I got after I filed a case and verified i was real person to their automated email.
Hello,
Your account has been suspended due to multiple or repeat violations of the Twitter Rules:
https://twitter.com/rules.
Please do not respond to this email as replies and new appeals for this account will not be monitored.
Thanks,
Twitter Support
I'm assuming my "repeat" violations were the subsequent posting of etherscan links. I had a prior post that got suspended that also had an etherscan link, that i reactivated with my phone, but i wasn't really sure what the issue was; now i definitely think they didn't like the etherscan links--maybe i should have tinyurl'd it?
Sucks, because i was trying to help someone find a transaction that was claiming their ico wasn't delivering to them (Refereum).