There's a discussion about whether volunteers running Tor relays should be motivated by cash reward. During the June 5th ResetTheNet campaign the EFF put up a landing page for beginners to set up nodes and rewarded people with merchandise etc. if they lasted a certain amount of time. But it's possible that many of the nodes that were set up because of this were not long-lasting.

Motivating people with short-term reward does not produce long-lasting relays.

EDIT: It seems like they are, but I wouldn't mind an update on this. https://www.eff.org/deeplinks/2014/09/tor-challenge-inspires...