ThisSegata Sanshiro commercial. Apparently there's no rule against grabbing a guy off the sideline and hurling him at the ball to score a goal for your team. Subverted when the referee gives Segata a red card.
In the Spock vs Spock Audi commercial, Zachary Quinto and Leonard Nimoy have a race to the golf course and the loser buys lunch. ZQ in his Audi wins the race but as Nimoy points out "Technically we're not inside yet" and subdues him with a Vulcan neck pinch.
Underoos brand underwear first got around the de facto taboo about showing a bunch of kids gallivanting in their underwear on TV by calling their product "costumes" instead of underwear.
Hasbro commissioned Marvel Comics to create a G.I. Joe: A Real American HeroComic Book and advertised it on TV for a special reason. Namely, animation featuring a toy on a TV commercial is strictly regulated, but the regulations were much laxer for an advertisement on a literary work. Thus the advertisements could feature their toys in full animation because it is officially the comic book itself that is being advertised.
In Sweden, it was once illegal for domestically-run commercial broadcasters to air commercial breaks during programs; they could only do it between programs. So what did TV4 (an OTA network which, unlike its cable-based competitors who broadcast from outside the country, was subject to said rules) do? They split a program with an interstitial, thus allowing them to air ads "between" programs.