Right...but nothing about Marco's statement suggests anything besides, "It turns out I feel really weird about making an ad blocker, and there isn't any way I can make an ad blocker that works in a way that doesn't make me feel weird with the iOS framework, so I'm not going to make one anymore."

Why not take his statement at face value? He's personally reliant on ad income from his site, as are several of his friends, so it makes sense that profiting off an ad blocker makes him uncomfortable. No conspiracy needed.

(For background, see: http://www.marco.org/2015/09/17/why-peace-blocks-deck-ads)