There is a similar site [1] without external incentives (actually Proof Market is based on this). This site has active audience posting problems and proofs. Po

There is a similar site [1] without external incentives (actually Proof Market is based on this). This site has active audience posting problems and proofs. Possibly Proof Market ends up in another example of overjustification. [1] http://as305.dyndns.org/aps/ http://as305.dyndns.org/aps/