[zo1]

Yes - but until such a time as we have a healthy ecosystem and interoperability, they are a defacto monopoly and I would assume the "anti-monopoly" people would just do something about it, if only to promote an ecosystem. Instead we live in this weird limbo where we can't criticize these platforms because "it's a private company" whilst still using it as if it's a government/society-level ubiquitous platform.