I think this is a big part of it. Paizo is a company that re-invented itself after losing multiple products/magazines that would have shuttered most others. They had Star Wars Insider, Ran the Star Wars fan club, published Dungeon and Dragon magazine, lost them all, and managed to come out beating D&D during the 4e era.
One of my big concerns is they now have a really good version of D&D to compete with and their release cycle is still pretty good, I think they're going to hit a saturation point where they are releasing books that will be less and less interesting. Erik Mona said a long time ago that he didn't want to just put out books for Pathfinder that copy what WOTC did with 3.0/3.5 and I think they're getting close to putting out "The Wizard's Complete Guide of Familiar's Familiar of Golarion". It's going to be interesting to see what Pathfinder Unchained has in it, a lot of fans are comparing it to 3.5's Book of Nine Swords, while others call it a Pathfinder 1.5 or playtest to 2.0.
It's going to be very interesting to see how they re-invent themselves this time!
Dramar