I've been on the internet a long, long time, and unfortunately this is true
Huge communities like this just become self-sustaining bubbles. He's not going to be getting big sponsorships anymore (well, at least for a few years lol) but he'll have merch and other, smaller revenue streams
They may be self-sustaining, but with a little backbone the rest of us can turn that into "contained" as anyone who outs themselves as a supporter or fan of PDFs can be shunned and pushed out of other ocmmunities
Its probably the best we can do but its something