It’s a pretty regulaely a big problem here.

But to answer your question, just check sources, verify with a second outlet, and call it out when you see it. That’s all you can do on an individual level.

Most of them are “just” a racket. They’re pointless middlemen who raise prices, but they generate sales tax so governments mandate their presence.

That being said they’re greasy as hell and deserve every bit of ire they receive. It is a very uniquely scummy business.