current alexa rank is 257k
they accept under 100k rank only.
Apart from MellowAds
[mentioned by NotATether], there are a few other ad networks in the following thread:
Does any bitcoin ad network accept adult ads?- I'm not sure about their limits when it comes to Alexa rankings but some of our comments might come in handy.many thanks
will take a look.
I saw now you are talking about Mellowads as a reputed ad network.
I think they are lost their credibility a long time ago. Check thread
Mellow ads accept advertisements from Bitcoin doubler websites. they have considerably lowered the criterion by which they accept advertisers, I find many scammers promoting in his network. This has resulted in their ads not being eligible on websites from many high reputed services. That's means if you use their network for your promotion, your ads will show on poor and low-quality pages.
It's just a suggestion, I would rather not use them and find another advertising service.