There&#x27;s also the W3C Web Payments Interest Group [1] and the defunct Micropayments Interest Group [2].<p>Micropayments for web content is notoriously hard.<p>Some existing players are:<p>* Flattr - <a href="https:&#x2F;&#x2F;flattr.com&#x2F;about" rel="nofollow">https:&#x2F;&#x2F;flattr.com&#x2F;about</a><p>* ChangeTip - <a href="https:&#x2F;&#x2F;www.changetip.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.changetip.com&#x2F;</a> (acqui-hired by AirBnB)<p>* Patreon - <a href="https:&#x2F;&#x2F;www.patreon.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.patreon.com&#x2F;</a><p>[1] <a href="https:&#x2F;&#x2F;www.w3.org&#x2F;Payments&#x2F;IG&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.w3.org&#x2F;Payments&#x2F;IG&#x2F;</a><p>[2] <a href="https:&#x2F;&#x2F;www.w3.org&#x2F;ECommerce&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.w3.org&#x2F;ECommerce&#x2F;</a>