in france every ad and brand was "olympic sponsor" or "random sport person use our product" and it was EVERYWHERE for a years befors the game, as a french I am happy that it will end.
america is the next country to host the olympic and the american advertisment game is next level for being agresive and everywhere so it will probably start way before.
and maybe you are already seing ad linked to the game.
sorry for my english as I am french