Am I missing something?

This very interesting article in the NYT Magazine about one of BMI's license enforcers notes that BMI has a worksheet to help owners figure out what they owe--based on CD players, TVs, karaokes, radios etc. present--but there's not a word about section 110's exemption for playing the radio/TV with sufficiently limited equipment in sufficiently small venues. Even if it's possible for a business owner to do the worksheet and find out that s/he owes nothing, wouldn't you think that it might have been important to mention that small fact? I couldn't find anything in the article to inform readers that it might sometimes be free to play the radio in public (as compared to at a private party, where the article did point out that you can play anything).