That too is what I thought of. Though in the book the product is of dubious quality and constantly changing what it promises. So it's hard to be believe someone thought it a good idea to associate their product

I think you may have misinterpreted what Ubik is in the book. It's not a product, and it seems to be the manifestation of some kind of creative force that negates entropy. The commercials quoted in each chapter are not real commercials in the book.

I hope it comes from Ubiquitous, because I could never quite understand Ubik :)