McEntire in her S&M video is advocating radio listening. This song and video came out at the same time there was a compaign on Right Wing Radio called, "I heart radio." The 'heart' is a visible heart symbol.
"iHeartRadio" (click here)
I suppose promoting radio is a way of increasing 'product distribution' but it is really odd a Country singer as popular as McEntire actually uses herself as a commercial for the industry. I think Reba wades into political activism more than anyone wants to talk about.
I haven't heard anything about Reba being a guest on Limbaugh.