said by Z80A:iAds aren't going to break anyones cap. No appreciable data is used unless they click the 3K banner and check out the rest of the iAd. The same could be said about ANY ad on any webpage they view. It is also no different that those on capped laptop 3G plans (like VZWs and AT&T's 5GB caps), those web banners count against their caps too. That isn't going to break anyone's 2097152KB cap or even 256,000KB cap unless they are watching a crap load of them and they include videos.
Anyone so concerned about their data usage need only not click the ads.
WTF, you dind't use the word "100M".