Your comment doesn’t make sense. What profit motive? It drove them to shutdown and people to use ad blockers. The feedback loop is positive: behave well -> profit. Your comment discusses the inverse: behave poorly -> go to jail.
The profit motive in question is the motive to fill your screen with shitty, laggy, possibly dangerous ads. Have you visited your local newspaper's website, or a fandom property, lately?
Once enough people do that, the users install adblockers, which also hurts advertisers who were not filling your screen with shitty, laggy, possibly dangerous ads.
The problem is, we don't have laws and courts for ads. That's why we are all forced to walk around heavily armed and shoot down whoever gets less than two metres apart from us!
When there's a profit motive, someone will always cut corners.