RPG Countdown keeps track of the hottest selling digital RPG products over at one bookshelf (Drive-Thru RPG and RPG Now).
Our show aims to be a reliable information source for what’s really selling out there, shedding light on the shadowy (sales) figures in this biz. Regrettably we have only a few sources of information at present, but we’re looking to change that.
Paizo, E23 Studios and RPG Objects may all be contributing their numbers soon, which would be great. I'm guessing that Pathfinder PDF sales this year should be staggering.
Most of the items we discuss on this top 100 list can be bought at the Paizo store.