"You wasted your time more effectively than most other crafters at MB. Here you go."

Achievements should unlock a special vendor that sells all the items you've already been crafting, cuz you know, whatever. It's crafting

Cynicism aside, I think it'd be a good idea so that crafters can get in on commendations as well, but like you, I feel it might be easy to abuse, unless there was a cap (maybe daily) on how many comms you can give or receive from the same person.