I have repeatedly been shown this ad for an online gambling site on Music SE:
While (heavily regulated) gambling is legal in my jurisdiction, I consider advertisements for online gambling to be inappropriate on SE. This ad is particularly objectionable, because as far as I can tell (French is not my first language) it seems to be surreptitiously aimed at an underage audience by suggesting online gambling as a way to pass "5 minutes de lecture" (5 minutes of reading), which I understand is an expression commonly used in schools.