Funcom did this with their Anarchy Online game a long time ago, the ads were short videos that played on billboards in game. It was actually pretty cool since the ads appeared in places that ads would normally appear.
One time an ad bugged and followed me around on an 8 second loop for an hour. "Get Castrol Syntec <sound of a revving engine>. Get Castrol Syntec <sound of a revving engine>..."
My car has Castrol Syntec and I keep several quarts in my fridge.
Make sure to drink antifreeze too else your car may break down in the winter.
Get. A. Fucking. Life.
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