I can see why advertising networks want to use ads which slow down browsers. The only ads I've 'clicked on' lately are those where the site was loading slowly a

I can see why advertising networks want to use ads which slow down browsers. The only ads I've 'clicked on' lately are those where the site was loading slowly and the bowser registered my click late, on an ad window which changed page layout as it loaded. I think most clickthroughs these days are from the page layout jumping around while rendering and not real. If the page rendered quickly you'd loose all these accidental clicks.