When a third party serves an ad to a user, the third party gets information about that person (their IP address, etc.) When Apple serves an ad to one of their users on behalf of an advertiser, on the other hand, the third party doesn't get any information at all.
Sure, Apple now knows I saw an ad... but Apple knows a lot of stuff about me; I'm already assuming they're trusted with my personal information the moment I set up iCloud Keychain or Find My Mac. Reducing the number of companies that know things about me down to the bare minimum (i.e. the same number that I actually do business with) is not a bad deal.
...of course, if iOS shipped with a "hosts file"-like configuration point, such that one could block iAds, that'd be a much more interesting world. (And not, strictly speaking, an impossible one; "featureful" VPN-proxy services are becoming more common—even Google is giving one away as part of Project Fi, to avoid "dirty" wifi—and iOS supports system VPNs, so you could set up your ad filtering at the head-end. I have no idea what Apple would do if this became common, though. Maybe just give app developers an API to ask whether "the phone can reach the internet but the ads aren't loading", and switch to a separate "hey stop that" view controller.)
The way forward is native ads (no, native ads aren't advertorials) like podcast ads, radio ads, or sponsored posts on individual blogs like Daring Fireball.
Or would you say that advertising is only for big shots, and small-time publishers should just rely on up-front payment?
every month a new layer show up, with the sole promise of allowing the ad vendor to pay less for the publisher. the fad du jour is viewable.
Disclaimer: There may be reasons this wouldn't work, technical or approval-wise, that I'm not aware of.
Each of the network extension points requires special permission from Apple.
Whatever that means.https://developer.apple.com/library/prerelease/ios/releaseno...
That aside, iAds are way nicer than ads on other platforms. The platform protects user privacy and doesn't resort to trickery and deception, and ads and advertisers are vetted. This stuff matters.