Right, I always open news front pages from a bookmark for some reason, and stories as background tabs. Each tab has its own delay-block when activated, and at some point I usually close unread tabs instead of waiting for them.

But the block repeats every few hours, and I'm pretty sure that clicking on a link within the same tab repeats the block then (maybe depends on the page). So yes, the "dosage" of how many delays you get is not very well controlled for. Still, I'm using this setup for years and it definitely does something for me.