PEERFLY, once of the largest, added a BTC payments few days ago.
Here is the topic: https://bitcointalksearch.org/topic/peerfly-now-offers-bitcoin-payments-for-its-affiliates-1879902
Still, I don't know how you should calculate taxes and so on. Because if you advert Primedice for example, you could hide your commissions. But it won't work with Peerfly.
Well if you're running RunCPA no doubt it is the best for BTCBTCBTC traffic. If you're into affiliate marketing that is outside the BTCBTCBTC niche, you should definitely check it out, it has thousands of offers with competitive payouts in a wide variety of niches, take a look:
http://www.peerflyoffers.com/
there are not clickbank bitcoin copies to my knowledge. RunCPA is utter garbage and not transparent, you'll never know if they fool you. I'm still waiting for an on-chain affiliate program with products.
We'll the same applies to any other affiliate network, as you can't really know if a network is shaving your leads, not until you split test the same everything to another network.
Anyhow, putting and recording affiliate transactions on the blockchain is truly a novel idea. I wonder why there aren't any startup doing this.
Well i am not a pro in affiliate programs but i have experience and still now i am working like peerfly max bounty cpalead mgcash and ogads. but the best site for me there are peerfly and maxbounty because of a good conversation rate and high payouts.
If he is looking for affiliate that paying for bitcoin I think there are still someone are paying in bitcoin here but they are still not so popular.
The only way to get bitcoin try receiving them earnings from those i mention and try to withdraw it in paypal and look for exchanging your paypal into bitcoin exchanger. before you can receive a bitcoin..