Earlier quoted context omitted.
Having inactive usernames is not an actual issue when people can just use other names. He is just trying to make more money by selling them and he is blaming it on the users. "See, they did not use the names in the artificially short period that I defined. I had no other option than taking them away and selling them to the highest bidder." Obviously he's not only selling Iranian names.
Regardless of whether you consider this action just, it is not gaslighting. Gaslighting has a specific definition, and this isn't it: https://en.wikipedia.org/wiki/Gaslighting
That's what he did. Telling users it is their own fault that he had to take their names and sell them. You were causing issues, because you did not log in for three months.