I haven't thought about this too much but perhaps the time quota based on the ID of the faction would be a good idea?
I can see two ways this could be done - based on the existing number of factions of a given ID or some kind of arbitrary power criterion of the respective IDs. I think the requirement of three active players should be retained (and checked properly as well), but total activity requirements could be increased or decreased based on these criteria. Perhaps also a requirement of forum RP (or at least a certain threshold of "answered" RP from other factions).
The reasoning for it is that there is not much to do in game for some of these factions, especially ones that shouldn't by lore trade in ores (Ageira, Cryer, Synth, etc) or some who are less powerful than others (like the Rogue ID is pmuch strictly worse than Outcast ID).