Text Messaging Powered By Cingular ??

What does this mean? I hear it on the radio, when a company offers to allow a listener to text in to request a song, etc. How can text messaging be “powered” by any one provider? Does this mean that I as a Verizon customer cannot text in? Does it mean that I am surcharged past the normal charge for a text message? Will my text messagenot be legible even if it is received?

Cartooniverse