Patreon was founded in May 2013 as a service with business tools that allow content creators to crowdfund their work through donations and subscriptions. The service is now expanding to help users …
Source: Patreon Launches App Directory and Free WordPress Plugin for Membership Sites – WordPress Tavern
Patreon has set things up so you can sell material though your WordPress site. At least that’s how I read it. I may try it, at least with upcoming Mythus material.