With due respect to the owners of FLGs…
Withholding PDF versions of games to force people to go to FLGs just doesn't make sense. For starters, because of the price, many gamers simply will not be able to buy many table top RPGs at full price. I know all of the arguments, $60 isn't that much vs. the price of a video game, etc… but the reality is that I am a husband and father of two kids, and a growing percentage of the gaming community are grown folk not young bucks with loads of disposable income. It is 100% true that a savings of $10 or 15 might very well mean the difference between buying the book or not at all.
Then there's the fact that even with only releasing physical product, FLGs still can't compete in price with Amazon, so they're not being "saved" by forcing people to buy real paper books, even if those people have access to an FLG… and many do not.
I don't know what's happened in other areas, but where I live there used to be half a dozen or more gaming shops within easy driving distance, and a dozen more if I was willing to hop on a freeway and go a little further (no more than a half hour drive). I was often willing to make those trips when looking for an anticipated product, when it was my only option. Now there are far fewer options, two within a short distance and maybe half a dozen in total. The ones that have survived are almost universally getting by on their relationships with customers and the "extras" they offer (card tournaments, open gaming sessions, game demos, and so on).
It's noble to say that "we support FLGs" but those brick and mortar stores are going to continue shrinking in number regardless. All that happens when a game company tries to force it's consumers to go through certain channels is less sales overall for the company, more sales for Amazon, and more dead trees (if you're one to care about that sort of thing). I would, frankly, be entirely shocked if refusing to release PDFs has resulted in more than a handful of additional sales for brick and mortar shops and honestly am more inclined to believe that it's a defense against piracy than that anyone really believes the practice saves FLGs.