They're a publically traded monopoly marketplace with special legal protection from being sued. I would be fine with them being forced to act like what they pretend to be- a commons, a market.

The freedom of a giant, monopolistic company is not aligned with the freedom of humans.

We already have precedents for conpanies being forced to impartiality- utilities. Ebay's a utility, the modern large-scale version of the ground a flea market sits on.