I'm familiar with that point of view. I found the Costco did carry other brands as well as the brand's that they had a contract with at the time. And because the others were more expressive for what I got, I voted with my wallet.

I've been to audiologists other than Costco staff. With my parents when they were aging and my in-laws when they were aging, and the last decade for myself and my spouse. They were IMHO worse than the worst of used car salesmen anywhere. If Costco puts a few of those scammers out of the ripping off grandma business, I'm okay with that!