Are you refering to his Patreon?
Because if you do, he states:
"Intemperance III will be offered here exclusively, chapter by chapter, until complete.".
Maybe my English is failing me (not my native language), but to me that says he will release it elsewhere when it is finished. Maybe even for free on SOL.
And with the way Patreon works you get access to all previous posts (here: chapters) as soon as you pledge. So in essence you can sign up now, get access to all 11 chapters currently finished, cancel the pledge, pay the 1 dollar and repeat once you think it is worth it.
So I don't really see a problem with him asking people to pay him per chapter, if they are inclined.