Oh, I never saw REBUSfarm during my initial price comparison. I would like to thank you for pointing them out to me ivan.

The sidebar of supported software does not list Blender3D. The only mention of support for it is from a January 2008 news post. A thread on Blender Artists, mentions that there is a 40 euro fee per render job when rendering a Blender scene due to it having to be submitted manually by REBUSfarm staff. I am aware that this info is out of date, I have contacted REBUSfarm about the current status and will post back when I receive a response. Also, there is the fact that REBUSfarm (and every render farm as far as I know) does not accept Bitcoins as payment.

Newspost: http://www.rebusfarm.com/newsflash/blender-3d-und-yafray_en.html
Forum Thread: http://blenderartists.org/forum/showthread.php?156368-Rebus-Render-Farm-For-Blender-(End-User-Review)