Doubt you can interact with the MB if you are a visitor. If they wanted to go all in on that they could have just linked them all. It's probably more like the tech used in Eureka, where you can play with people in the zones on the server and do all that stuff that have personal rewards (FATEs, hunts) and maybe stuff you roll on like treasure maps but won't be able to trade, use the MB or buy houses. Could be wrong but eh.