Far more player-to-player interaction

[TheDroppedFry]

No comment.

[Canadian-bacon]

-Illegal Business, it's mafia rp, if you're gonna be illegal, expect to deal with cops
-For ownership yes, most factions will rent to people for events, it requires talking and roleplaying with them
-People interact all the time? They run restaurants and make deals, the entire underworld drug trade relies on some form of interaction to make sales?

Have you even bothered to play as a criminal character? Half the points you're making feel like the perspective of an outsider. Part of the RP is forming IC connections in order to enter the inner circles. Not to mention the multitude of players in the streets during peak hours. However this does attract the minges more frequently. Consequence of a successful rp business.