Offering Gifts for Returning Players

[Mules]

I've noticed that on successful MMO's they have offered players gifts for returning back to their game. Normally it's in the form of experience potions, or special benefits pertaining to stats or whatever the case may be.

If there would be some sort of way to send a notification to all idle accounts that they have a gift waiting for them if they return in a certain amount of time, I'm sure it would bring some players back at least to check it out. And who knows, you might get a few who stay around.

It could be any thing from a unique item, to a potion that increases experience gain for a certain amount of time.