looking to buy advertising space bitcoin niche

[bitcoin110011]

Hi
I have a bitcoin related website
www.btcjack.com
I hold weekly freerolls exclusive ones for bitcoin poker players
I am currently looking for websites to advertise in.
I do not like all the advertising websites that offer CPM / CPC
I am looking for a weekly/monthly deal payment

Website needs to be in the bitcoin niche , high alexa ranking
Alot of traffic
Willing to pay good money for a good source