Edit: hadn't read the full thing - it's just a guy that shared stuff her sister said to him for internet points - what a loser
That's very wise.
Here's an illustrative tale, although I'm omitting details that could identify myself or the companies involved.
Many years ago when I was still pretty wet behind the ears, I had just completed the sale of my company to another. This was fairly big news at the time, and my phone was ringing off the hook with reporters wanting more details. The details -- especially the sale price -- were confidential, and I was contractually prohibited from discussing them.
One particularly devious reporter managed to get me involved in a "friendly" conversation talking generally (and safely) about the the two companies, then when my guard was down, asked me a question that wasn't directly about the sale price -- but my answer did tell him the general magnitude of it, which he reported.
It was a huge hairy problem that took weeks to smooth over. It nearly made the deal fall through. I learned to never talk to reporters. Some of them are very, very good at their job.
I have a hard time believing that's common, if for no other reason than because it would open those websites up to legal liability.
Doubt it's a good way to run a profitable enterprise - but I'm sure some people do