Hi,
if you have a bitcoin related website I prefer coinzilla.io, with greater traffic you have greater rates, you could take a shot to see how it works for you, another one is cointraffic but it works good with their floating banner.
Good luck!
I am interested to know how it works in depth the coinzilla.io, I have a bitcoin news website which I own and I am afraid to work with google, they ban everyone ,yes even legit persons, they just do not care and they ban everyone who makes more than 600 USD/EUR/GBP in a month. A lot of friends of mine and me too have been banned by google. I have not broken a single rule from them. Anyway coinzilla.io what should I do, create an account there and they will put banner ads in my website banner spaces ? Maybe I try a bit later as right now I am rebuilding the website from scratch.