Theymos is accepting illegal ads from a ponzi scheme - makebtc.org.
https://bitcointalk.org/index.php?topic=450959.20

It's obviously a ponzi scheme. I'm not sure what his jurisdiction is, but it is most likely illegal to have a ponzi scheme.

I pm-ed him and got no response.

If the website was labeled as gambling it would be legal in some jurisdictions. However it is not.

As he is making money from advertising the scam, he is morally and legally responsible for it.