THX's origins had nothing to do with the business model they created, which was purely to generate a revenue stream. Lucas absolutely controlled and profited from it.
If you have some insider information that contradicts the widespread documented evidence of THX's origins, please share it, because this is not what I've heard.
Everything I've heard and read about THX's origins has to do with Lucas being dissatisfied with the low standards of theatrical exhibition at that point, and wanted his films being shown in the best possible fashion, hence the creation of THX in concert with Tom Hollman.
As I said before, I don't know what eventually became of THX later on, but to say it was
created as nothing more than a revenue stream goes against everything I know about Lucas as a filmmaker, since his entire Skywalker Ranch creation was a way for him to give back to the filmmaking community he experienced as a student at USC film school. He gave his friends offices at Skywalker, created Edit Droid (which eventually spun off into Avid and the digital editing suites that are common today) to make the editing of films an easier more intuitive process for artists. ILM was of course created out of necessity for Star Wars, but became a tool to facilitate the endless imaginations of artists so they could create the worlds in their head. Everything Lucas created under his Lucasfilm banner was a direct reaction to the tampering Hollywood did to his first two films, which devastated him. I'm not saying he didn't profit from these ventures, I'm saying he did not create them solely to make money... he was an artist first, and a businessman second. Besides, he already had plenty money without them. American Graffiti made him a multi millionaire before Star Wars was even shot.
This is why I have a hard time believing you. You seem to have an axe to grind with THX and Dolby, and while I can't vouch for Dolby (I know nothing about them), I've read almost every pieces of literature about Lucas and Lucasfilm, but I would be more than happy to be proven wrong about the creation of THX if you can provide some legitimate sources that prove it was
nothing more than a profit motivated venture.