Oh yeah! Lol, Like the ones that list nutritional information, ingredient statements, etc? (As far as my other docs like HACCP plan, GFSI stuff, etc, there's no way I'll post on a site like that. I'll give out a flow chart to a big customer, but not much else.)
If you're a big customer, I'll do a bare minimum for such things, but if you expect us to pay, we're just going to build it into the price of what we sell you. One way or another, we're not paying for it. If it's time consuming, requires training, etc, it's just a hard no. In my experience, it's usually the smaller places that want to wade into such things, the big players know better, but I'm sure there are big players out there that I don't deal with that use um. I can see Costco or Whole Foods or whoever requiring this kind of thing....
However, most everyone we deal with that was using these sites in the last ten years has stopped. Nobody ever looks at them! The last one I was dealing with, the customer finally agreed to maintain it if I would send them the documents, which I did. I was getting updates emailed to me monthly of how many users had looked at said info. Not one. Ever... in like 3 years. I pointed that out to my contact, and after investigating they discontinued the whole thing.
Nobody gets on those things.... They're a joke.