Twitter will remove inactive users from 11 December. Consequently, several older usernames are going to be released eventually.
Twitter clarifies it will gradually remove inactive balances. As a result, their tweets also vanish, and they also will no longer matter as fans along with other profiles.
For profiles of deceased persons, the company is contemplating a sort of Memoriam where the tweets of the person can be preserved, but how exactly that will work will not be yet clear.
As accounts are cleaned up, an individual titles of those profiles are also launched. When that occurs effectively is not identified. The Verge information that all combinations with five letters have been consumed these days, many of them could be released eventually.