Many true Nerd has a fairly successful patreon where all you get is effectively a bit of author commentary once a month. Nothing more - not even advanced versions of the videos MATN produces. The Giant could easily just post a bit of commentary of whatever is on his mind once per month in the Patreon section and call it good enough. I'd probably sign up for no perks whatsoever - just have Patreon send him a buck per posted page.
But on the other paw, this might not be all that helpful to him - chances are, this would just cannibalise other income streams. If I'd paid $274 for BRitF, I'd find it hard to justify buying the book.
GW