"I noticed today listening to WKTU 103.5 HD 2 Country they are now airing commercials during their breaks."
Many stations such as CBS FM are airing spots but that's because the commercials which do air are paid for to play on their playing on their .com stream and not their HD 2 stream. I haven't even heard HD 2 mentioned on CBS FM. They do ID as WCBS FM.com all the time. Many of the other HD 2's are also streamed on line and the stations are selling those spots at a much reduced rate to advertisers. WCBS AM, while the Yankee flagship station no longer discontinues all news coverage while a game is playing. They continue broadcasting news live on the internet and playing spots which have been purchased at a lower rate. This gives many smaller businesses the chance to get in the game and get their word out to the internet audience and I know stations such as WFAN now get phone calls from all over the country due to all their new internet audience. As I've written previously, as much as I'm for HD and any advancement in technology my belief is that within the next 10 years as Wi-Fi expands you'll see that it will become THE method people use to receive broadcasts, as opposed to either terrestrial radio or the sats.