It's not text messaging. I gather that the concept is that you record your own voice message (or get someone who's good at it) offering your services/offers for new/existing custy's, then you pay for the names/addresses where you want to target. Then they somehow automatically send these recordings to answerphones where the message is left. Im sure its also available for mobiles too, but would imagine it is less effective?
They do the whole lot as a service, so just wondered what it was like.