Mr. Billion participates in a few different Wikimedia projects, including Wikipedia, Wiktionary, Wikiquote, and a few others. Like many or even most Wikimedia participants, the majority of my edits have gone to Wikipedia.

The user name originates from a certain Calvin & Hobbes strip taking place in the classroom in which Calvin attempts to solve a math problem and slips into his Tracer Bullet fantasy world, concluding that the only possible "culprit" is "Mr. Billion."