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
It's always been a reminder for the rest of people who have twitter accounts to be careful with what they are tweeting especially in the heights of crypto fraud/scam that's been the mainstream lately. To prevent others to get scammed, it's the initiative of this Social Networking Site giant to help protect their users welfare.