Do not use ad networks, none of them, they are the source of all this Internet scummery. The spam, the low quality ads for fraud products, and the ads themselves are virus delivery networks. If you really need advertising to support your product, do you really have a product? Or are ya just gossip, er "social media". Social media is just gossip, monetized, what was before recognized as the lowest form of communication now monetized and washed from that dirty name "gossip", now it's "media", "social media"... what fools mass culture is composed.
You also have to block the trackers that feed your behavioral data to the brokers that, in turn, fuels the invasive profiling the advertisers use to bid against.
