User blog comment:Tedgill/Making Ads Better: How We're Going to Do It/@comment-25150955-20170120185310/@comment-5558012-20170120195913

Larger ads -> more money -> less ads -> less performance and layout issues -> less noticeable overall (at least some of these larger ads can be minimized). Smaller ads -> less money -> more ads -> more performance and layout issues -> more noticeable overall.