Previous usernames on instagram

Hi guys, how will this impact selling accounts when anyone can look up previous usernames?
Do you think this will make it more difficult for us to sell accounts or are you not bothered? Also does this feature only show up for business accounts or does it include personal accounts as well?
Thanks in advance.

Why would anyone care. Unless you converted account from one niche to another with mainly followers of the earlier one to sell account in "harder to grow" one which can be seen already.