Here's a question whose answer I genuinely don't know: how many companies are there out there these days the majority of whose incomes derive from RPGs and which have 10 or more salaried employees? Off the top of my head, the only one I can think of is Paizo, though perhaps White Wolf still qualifies too. Most of the other companies I can think of whose incomes derive primarily from RPGs have, at most, only a handful of salaried employees, assuming they have any at all.
Unless I'm simply overlooking a large number of companies (which is possible), this means that most RPG publishing is a part-time or even hobbyist affair rather than something more grandiose. Mind you, I'm not sure this is any different than it was back in the day. When I entered the hobby, I suspect TSR was one of the few companies to have more than 10 salaried employees whose income was mostly from RPG sales. Nearly every other company was probably a two or three-man operation done on a part-time basis or as an adjunct to some other kind of publishing or manufacturing -- just like today.