On the radio - 49330

Radio Data Group Inc. provides "a radio-friendly texting tool- so you can text your listeners and they can text you?" So what is a radio-unfriendly texting tool? The most interesting thing I read at www.rdg.com/mxm is that there is "No set up or messaging fees" and "No requirement to charge listeners premium fees", but there is "Barter pricing that's flat, predictable, and all-inclusive " But, what is barter pricing?