Use them all you want.
I had a lot of fun using them and making them, but now that they've been used by me, the only logical thing would be to let other Cyberpunk players use them.
Part of the scheme was to use them as a way to illustrate the difference in the brands. I wanted characters who didn't want just any clothes, they wanted CryoMax or some other brand-loyalty thing, instead of just saying "I want an SP15 Edgerunner Jacket of good quality." The game is about style and style requires billboards and commercialism.
The other thing I would use them for is scream sheets, which served as our funny game logs.
For example, this one after a very exciting game.