Before I unlocked the east island, I used the yankee method to get over there early to get the red balloons and take over the last Cholo business. The Sharks also left their businesses unoccupied, so I took a few. Now, I've unlocked the East Island, have done Accidents will happen and unfriendly competition, and am up to turn on, tune in, bug out. I've unlocked the smuggling and drugs businesses, but no robbery businesses will spawn. The Bikers had one at some point. I took over one of their drug businesses west of the North Point Mall, then saved the game and turned off. When I reloaded the game, the robbery business had been taken over by the Sharks. Now, there aren't any robbery businesses. I tried attacking a site then leaving it unoccupied so that a rival gang might form a robbery business, but they won't make one, only one of the other businesses. Has anyone else encountered this?