It was never different. Just, with the advent of iPhone, FB, WhatsApp, Youtube, etc, a lot of people basically decided to ignore this fact of life. So good and for so long that they completely forgot it. They forgot it good enough that even their childs got no education in that regard. And every some days, someone gets a lesson. ;)
Why should Yelp not throw you under the bus for money?
The problem was that (impersonal) you stopped understanding basic mechanisms of human interaction. For no real reason.
Given how many stories of greed and throwing people under the bus for money I hear nowadays, we might already be living in a dystopia.