in my experiences with osx/safari traffic there are generally 3 types of people with mac products, >21 trendy/hip/techsavvy/'will not click your crush ad'/hates any type of online advertising not by a major brand, >40 people who are difficult to categorize and may or may not be smart, and then the other type, who only have macs because they've been seduced by the brand and trends (not that the other group doesn't) but will still click your crush ads and are generally <25 and stupid enough to fall for mobile offers or other idiot stuff. figure out which you get traffic for, figure out what group angry birds attracts, do demographic profiles on other angry bird sites from quantcast, maybe try to get data from the angry birds people themselves, then attempt to monetize that. as far as cpa offers, you might get a higher epc/ecpm from just going with some sort of cpm network as a pub and then trying to get branders with mac products to pay high rates for your site. you could even reach out to other app devs or mac related products/services and tell them you're accepting advertising and if they'd be interested. it's hard to monetize the tech savvy audience with cpa offers. i mean imagine how your cpa stuff would do on reddit or something. it sounds like you might have enough traffic to be a pub in some of the networks like cpx/casale/tribalfusion/valueclick/burst/gorilla so you should reach out to ALL of them with an email to see what they can do for you. any networks that have high cpms and often promote corporate/tech type shit where they pay 5 dolla cpms n wanna billboard their shit. your traffic is probably but not definitely not ideal cpa traffic but it may possibly be very good traffic for a certain other type of monetization.