The Five Tiers of RPG Publishing

I know I’ve said many, many times before that D&D has an outsized impact on the market, but I want to make it clear what I mean. I’ve broken the RPG publishing industry into five tiers: the first four are categorized by revenue, each an entire order of magnitude smaller than the last. The final tier is everyone else who’s more than an order of magnitude smaller than the previous tier. The tiers are named by approximate revenue values: 500 million, 50 million, 5 million, and 0.5 million, with Everyone Else at the end.