There have been a lot of remailers in the past. It's hard for me to see what legitimate purpose this service provides for Mozilla as an organization or for user

There have been a lot of remailers in the past. It's hard for me to see what legitimate purpose this service provides for Mozilla as an organization or for users of the free web. It would be nice to have an account-specific email address that is not shared with other services. (We kinda have that with the "+" trick.) But it can't process replies so that dramatically limits the use-cases for non-spammers.