As some readers have noted, Mafia Wars is giving players a reason to go back and complete levels in New York, Cuba, Moscow, and Bangkok, with the Triple Old City Mastery feature:
This has advantages for both old and new players: If you were just starting this game, you would NEVER sludge through New York (yes, sludge - I live there) to get your coveted 4-attack Armored Truck.
You *certainly* would never endure the Mafia Wars equivalent of childbirth to scratch out enough Baht, little by little, plus the 4,900 necessary Satellite phones, to progress through Bangkok. Instead, you would jump right into Las Vegas... and then Italy, where the loot is 20x better - and you can speed through the opening levels.
If you're a veteran with unfinished jobs/levels, you also want to focus all your Energy and Stamina in Italy as it opens, rather than the Avtoritet Level in Moscow.
So the Triple Mastery program (coupled with the occasional 2x Mastery bonus gift you can get/receive when doing jobs) will give you the incentive to get through those top tier jobs (where you're getting 1% or 2% mastery otherwise) AND pile up some Baht to but whatever's still worth buying in the Faction Store.
Nice move by Mafia Wars here.