It flashed over my screen for a millisecond.

huh? what's that? a pop-under? did I turn ad-block off again?

2 days after their "publicity" campaign launched, things like...

"we have detected you using an ad-blocking service. Your wait time before this video plays has been increased"

...started to show up on various websites.

If "ad-blockers" become widely used, they will stop working effectively because the advertisers will have to make sure their ads are "seen".