OpenGameArt

http://opengameart.org/content/donate-bitcoins

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OpenGameArt.org, often referred to as Open Game Art (OGA), is an online repository of freely licensed art assets for video games. It hosts 2D/3D artwork, textures, sounds, and tutorials intended for use with free/open-source game projects, with licenses such as CC BY-SA, CC BY, GPL/LGPL, or CC0. The project was founded by Bart Kelsey (also associated with Bart Veldhuizen) and has operated since its public launch in 2009. (en.wikipedia.org)

Regarding fundraising, the site has historically offered Bitcoin as a donation option alongside PayPal and other methods; a 2010 post on OpenGameArt explicitly described donating Bitcoins as an alternative method for supporters. This demonstrates the site’s willingness to accept cryptocurrency donations as part of its funding approach. (opengameart.org)