Basically set up a stretch goal voting system where each time a cash purchase is made (of whatever type - store / MC / steam etc.) the purchaser gets to vote on what PGI should develop.
e.g. For each five dollars spent, the vote could count for one point, and there would be varied selections. A very basic example of what the topics may look like is below.
Solaris:
- 1000 points = new all vs all game mode
- 2000 points = new Solaris maps
- 5000 points = voiced comantator
Faction play
- 1000 points = new themed conflict each week
- 2000 points = add hire and fire forums where factions can employ mercs
- 5000 points = AI scripted tanks and air support
General:
- 1000 points = new QP map based on a space city
- 2000 points = ability to select appearance of mechwarrior
- 5000 points = removal of terra therma