@Cobaltasaurus said:
The proposal is for a Mage game, so I'm presuming it's Mage + Mortal (and by that, I also mean Mortal+). So, for that kind of game, 1 alt is just fine.
On social influence, RfK's system is a good model. I would simplify it substantially, mind, but it has the effect of creating a mundane political mini-game that Supers and Mortals can play with in the background. It generates a surprising amount of RP.
On the XP system proposed, RfK is again my model. There, you can claim beats for having a scene (1), meeting or working towards an aspiration (1), RPing a particular theme (1), attending an event (1), resolving a Condition (1), and other events. You can also give a Beat for good RP, which they call Squees. The amount of beats you can accumulate in a particular time frame for a particular type of claimed beat is capped. And you have to provide a brief justification for each claimed beat.
This system is very labor-intensive for staff, who have to check each PC for claimed beats on a weekly basis. However, it has the side-benefit of providing a "player RP report" on a weekly basis, from which staff can figure out what's going on, who's doing what, and so on. The other side-benefit is that players can also keep track of what they've done, using the system to log their weekly activities.