As in, he actually paid a few people to work full time on developing playable content.
Right now we get new content maybe every 1-2 years(besides cosmetics).
Just think how amazing the game would be if Stefan actually paid someone to make content. As of now all there is a bunch of volunteers working for free, throwing something out when they feel like they have the time.
They're probably making a ****load of money off of gralat packs, I don't see why he can't hire a couple full time devs, or even hire freelancers to do a bit of coding on the side.