How many direct @-tweets can I write to without spamming?
I'm about to start a charity cause on Thunderclap (https://www.thunderclap.it/) and to raise awareness I'm thinking of targeting 180 famous twitter users. I will tweet each one by themself like this:
@username Hi! Can you please support my cause? http://thndr.it/test
Will twitter view this as spam?
Thanks for you help!
Hank