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Admob has a lock-in on the iPhone ecosystem that's hard to break.

• xsmasher 17y ago
  Bingo. In order to beat admob you have to move their advertisers to your system (may be easy) and try to get app developers to run your ads instead of Admob's ads (hard). It's a bit of a chicken-and-egg scenario (devs will not move until the advertisers are there, etc.) and much easier to just buy them outright.