Reply To: Market for Jewish Books: Substance vs. Fluff

As noted by others – publishers need buyers to make money. So, by definition there will be more buyers for more accessible works.
Also: Buyers of serious reform typically buy them in Hebrew.
Last note recent Artscroll translations of serious works like the new Artscroll tosfos, Sefer haChinuch, Drashos haRan, Ramban on Torah, etc.