Originally Posted by
Melichoir
lets say they did decide to change how mailing works and you can now mail to alts. Again, the rational thing for most people is to create bank alts. This means less retainer purchases. So either SE does one of two things if they want to keep that option open - Make storage account wide, so now all alts share the same storage space, OR raise the cost of the sub from 15 to something else (possibly 20 as a throw away average).
Both of those have pretty negative impacts, no matter how you cut it. If you make storage account wide, every time you have an alt, you 'divide' your storage space (so if you have 100 storage, an alt would make that 50 storage effectively between your main and alt, 3 alts would make it 33, 4 is 25, etc), eventually ending up with less overall storage than a person who only has one characters worth of items. You also screw over people who dont want shared bank inventory space.
If you raise tuition, you screw over people who do have the bigger account size for other purposes rather than wanting alts to play. Not to mention you create a higher barrier of entry for players which may disincentive people keeping their subs.