As long as the API remains public there will be add free Lemmy on the ads. But your right as long as people start coming out to these "malls" where there is no shopping to be had, the food is free, lots of chatter and there's lots of seating. Eventually there is bound to be a catch, there's lots of people hanging about, if I was the monopoly guy I would be figuring out how to get these people to spend money, especially the cost of keeping the mall open goes up.