Stereo for TV Infomercials?

There is something interesting in the infomercial for J.G. Banks Secrets of Probate Profits. Near the beginning of the infomercial, the words “Dolby Surround” and the Dolby logo appear.

Is there some big demand to have Dolby Surround for an infomercial or any reason why an infomercial would be eager to advertise this feature? I could understand the benefit to infomercials selling music collections, such as the 70s Music Explosion with Barry Williams. But J.G. Banks Secrets of Probate Profits advertises a money-making seminar.