Just added that into my post after you quoted my post.

Well, as I said, pretty much everyone is misusing the rule, but they are never punished - just like you mentioned. However, if a team is down and there's only a few minutes to go, I feel like the referee is very aware of the rule (and the keepers too). So even though they might misuse the rule a bit at the end of a crucial game, they aren't holding on to the ball for 20 seconds, and that's the most important thing.