There are some options for bitcoin ads network:
https://bitcointalk.org/index.php?topic=1108616.0 the OP inactive, but you check the thread, people discussed about it. I suggest you a-ads, it's good for your start earning, although the rate for impression is in low level, unless people click the ads.
If you want to approve by such company, so you need to follow their requirements, you can use traffic exchange to get requirements ranking.
I tried a-ads,they are user-friendly, but they pay very low because of the lack of advertisers.
I don`t think that traffic exchanges can boost Alexa rank.
There was a webiste called alexamaster.net which helps for boosting alexa rank.
I`ve never used it before and i can`t recommend it.Maybe there are some working methods available online for free.
Buy traffic is the instant way, but need a cost to order it, what can I see is the system works basically like traffic exchange site common, using a point to redeem to money, the different is the earning point is can't redeem to traffic. So I think basically it's same as free traffic exchange commonly.
I checked the site looks doubt, because the database for payment proof is error, they said have been payout a lot money, hmm...