Well by definition on google because I'm lazy lol
Patreon is a crowdfunding platform that enables fans (or patrons) to pay and support artists for their work. For producers of videos, webcomics, music, podcasts and more,
Patreon is a way to earn extra money on what might otherwise be free content, and allows fans to contribute to their favorite artist's platform.
And patreon's pay that tier level EVERY month. It's not just a one time donation.
I suspect that the "Abbie" level is the most popular. $25.00/month or $300.00/year
They currently have 530 patreons. So it can generate anywhere from $1,060 per month to $13,250.00 per month.
This is their patreon page:
https://www.patreon.com/FatheringAutism