I suspect interoperability is fundamentally at odds with ad-driven business models. When your business is run on ads, you are essentially serving users a mixtu

I suspect interoperability is fundamentally at odds with ad-driven business models. When your business is run on ads, you are essentially serving users a mixture of information they do want to see (content) and don't (ads). If your system must allow interoperability, then it's inevitable that a competitor will come along and separate out the content from the ads to give users the experience they want, but killing your business model as a consequence.