Using In-game Email for Quest-type System

(I posted this in the "Ask the Dev" thread, but someone suggested I place this here.)

I know we don't have a quest system, but couldn't the email system be used in a sort-of quest system?  I've been playing 9Dragons and one thing I like is how you gain new missions as you level up or hit other milestones.  Couldn't a system be put in place that could email players non-tradeable "golden ticket"-type missions  based on leveling up, hitting a certain number of CQ points, etc.?  Just a thought.

Well, the quest-type things we've seen in the game (such as Binary Boy or the trail of collectors leading you through Uriah) are basically obtaining a certain amount of items and give them to a collector.

 So, using the email system, a player could receive a golden ticket mission, with the instructions in the details (e.g. "Obtain five Special Silver Badges and 20 robot parts", and once you do that, you activate the ticket, which spawns a mission in a location with the NPC (either new or major/minor character).

Or say you hit (again, as an example) 1000 CQ points.  You get a golden ticket email for a chance to meet and maybe spar with Seraph (or a simulacrum of him). 

Again, it's just an idea.