This is correct. I give $3/month on patreon for 2 chapters a week to this one author. $36/year isn't a lot, but it takes these authors' years to finish these books at this rate, and any author would kill for the amount of amount I sunk into 1 book. Multiply it out, and it becomes a livable wage if you can get enough people to support your patreon. I have a friend I personally know who did this. He's not even a good writer. He just found an underserved niche and made a livable wage $1from somebody at a time. His writing improved and I'd say it's passable, but no one would pay $10 at all once for any book he wrote. Apparently over a year is fine though.