Why can’t the ad downloads be bundles of native code, instead of
native SDK do more than HTML5? For starters, third-party iOS apps
are currently unable to load external native libraries on-the-fly.
This technical restriction would have to be lifted in some fashion
for native iAds to be a reality. This would be not just a huge
policy reversal, but a security and stability headache as well:
errant or rampant web code is generally less dangerous than errant
or rampant native code. WebKit is already on every iOS device,
with zero system changes. It’s not worth the trouble.