There's also the W3C Web Payments Interest Group [1] and the defunct Micropayments Interest Group [2]. Micropayments for web content is notoriously hard. Some

There's also the W3C Web Payments Interest Group [1] and the defunct Micropayments Interest Group [2]. Micropayments for web content is notoriously hard. Some existing players are: * Flattr - https://flattr.com/about https://flattr.com/about * ChangeTip - https://www.changetip.com/ https://www.changetip.com/ (acqui-hired by AirBnB) * Patreon - https://www.patreon.com/ https://www.patreon.com/ [1] https://www.w3.org/Payments/IG/ https://www.w3.org/Payments/IG/ [2] https://www.w3.org/ECommerce/ https://www.w3.org/ECommerce/