Originally Posted by
Jojoya
If this was truly about storage being used for monetization...
... they wouldn't have increased player and retainer inventory sizes a few years back.
... they wouldn't have given us chocobo saddlebags.
... they wouldn't have given us a glamour dresser.
... they wouldn't have given us the Store Room for housing.
All those things increased the total storage available to players without increasing revenue per player. They decreased our need to purchase retainers and thus the potential revenue to be gained through the sale of additional storage.
If SE isn't seeing that many players using alts as additional storage for a main character as you believe, it's because people aren't after additional storage for items that can be traded. If those players want the extra storage at all, it's for items that can't be traded like gear for glamours. Any intelligent person who wants additional storage for items that can be traded is already making use of alts because it's by far the cheapest option.
The game isn't going to suffer any additional harm if alts were allowed to send mail to each other. The harm is already being done through the marketboard and FC chests.
I still don't ever expect to see it happen. There's too much moldy leftover spaghetti code in the game. It's been 2 years since SE told us they wanted to set things up so alts would automatically be tenants of a private house owned by another character on the same account and world, and that hasn't happened yet. It's likely related to the same code that controls our ability to add friends and send mail.
And since I can still easily transfer items between my alts using the FC chest and marketboard, not being able to use the mail system to do it doesn't bother me. It would be nice to have but I don't need it.