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[squirelpoo]

whats the big fuss about companies naming the track their using to promote the item, it would solve so many answers and give the artist the credit they deserve

[Mabelcat]

The money paid for the advertisement is paid to advertise the product not the music. No company would want to use valuable air-time to promote a rival product - the music. Attention would also be diverted from the product.
Most themes for commercials are easily researched via the internet anyway.