As I'm sitting here moving 10 backpacks of symbs from my doc to one of my bank mules I was thinking of how nice it would be if my froob toons had access to the GMI.
You can already buy Mail access for $5, why not add an ala carte option to buy GMI access for a one time cost of $10 or $15 (with the requirement, obviously being that you buy Mail access first). I'd gladly pay $15-$20 for the convenience of being able to use mail and sell stuff directly from the toons that hold things rather than having to deal with it on my paid characters.