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
If this is true, then it remains only to express regret. In this case, there is a high probability that the times of massive and successful projects in twitter are coming to an end. Personally, I do not see any reason to spend more bounty campaigns there. Just the result there usually turns out to be insignificant, and efforts really need to be made a lot.