Comment by Eridrus

I think the simple argument here is that the ad ecosystem should be rebuilt on the default assumption being that ad creatives should be an image and a link with no support for arbitrary rich content.

It would break the long tail of the ad ecosystem, but a bunch of people think the tradeoff is fine.

Given how much of online advertising is now in walled gardens rather than display ads, I think this shows this is more doable than the people who are part of the open ecosystem want it to be.