Now there are massive blocking of Twitter accounts.
Most often, block accounts when you to use mass-following. Blocks is forever!
Also do not use hashtags #ICO #Cryptocurrency etc
Be careful!
UPD
Some accounts of my friends that have been blocked marked "forever" are now unlocked
But anyway, I think we need to be careful
My brother had this experience in twitter as well. It was when one night he went on a hunt for people with "follow back/ICO/cryptocurrency" in their profiles and started following them on spree. Luckily, his account was just suspended for a certain amount of time I'm not sure if it's 24hrs or so. Twitter said that he's been suspected of being a bot account due to following unreasonably more people in such a small amount of time, like a hundred in a minute or something. We just made fun out of it though. But it's my first time reading about being blocked for using crypto-related hashtags.