This has been done and thought of before. I'll go over why you don't see anyone using it. :) Now obviously the "2 seconds" would need to be tweaked to be slowe

This has been done and thought of before. I'll go over why you don't see anyone using it. :) Now obviously the "2 seconds" would need to be tweaked to be slower. Throttling my internet to 'GPRS' in Chrome results in the site thinking I'm using an ad blocker (for this demonstration, I disabled it). It took 2.10s before my browser tried to download adv.css which resulted in me being flagged for using an ad blocker. You'll want to serve your site to users quickly or you'll raise your bounce rate (and possibly get less ad impressions as a result). But now you're looking at a 3s~ delay just to serve an image. Imagine if you had a site, more images, some javascript, etc? Would users even attempt to browse your site if every page load took 3-5 seconds to read the content because you were waiting to serve content while detecting if they are using an ad blocker? If AdBlockers hurt you so much that having a 3-5s delay to serve your website is a realistic alternative you're better off shutting up shop or dealing with the fact your site is simply not profitable.