Considering many people want more businesses, wouldn't it be cool to have mercs that cost regular cash and upkeep, instead of diamonds?
This means that people who have played for very long and have a really high income can become closer to the top diamond players and thus be rewarded for playing that long.
In the most practical view, it just means that after equipping your entire mob, you can get an additional mob member for 1.3 times the upkeep of the weapons+armors+vehicles or something like that.
Start out with 4 different ones, perhaps?
100 000 upkeep
+1 weapon, +1 armor, +1 vehicle
200 000 upkeep
So 10 million will get you +1000, +1000 and 100 weapons, armors OR vehicles. Or it will get you +1000, +1000 and 50 weapons, armors AND vehicles.
//Formidable - DeathWish MGS