I got approved on peerfly and maxbounty on the same day. Even if you get rejected, just give a call and be bold while talking ask what is the reason to decline the application and be true with the traffic source you use, they will approve.
As per my knowledge, they are most happy with PPC traffic from bing, FB and G Ads and not too much interested in email traffic, but they are okay with search traffic, if your site has good number of visitors and is related to the niche what you tell them you're going to promote.
BTW, I'm from India and it's real easy to get approved, if you have already worked with other networks.