So you delete email accounts due to inactivity, but you hold the usernames as unavailable why??
I wanted to log back into my old account and recover my contacts and reconnect with old friends but you have deleted the account so I cant recover contacts. I wanted to Create a new account with the same log in again so I could recover other emails that use this one as the recovery address but I cant do that either because you are holding my username ******* effectively.
Maybe you could quarantine old usernames for a set period of time then release them to be useable again