[epistasis]

This is the difference between public and private entities.

However when a monopoly starts to take over, what is a private entity starts to have governmental powers.

In the US, there has been a century long politics effort to reduce anti-monopoly protections, to the point that the standard is now "are consumers being actively harmed in pricing" and what you experience would likely never be considered something that could now result in anti-monopoly action.

And without those anti-monopoly protections, eBay gets to collect economic rents—pure economic waste that profits eBay and hurts everyone else.

We need a return to Georgism to help fight some really bad politics that have developed over the past century.