This should not depend on dominance, it depends on older ideas about intermediaries and the duty of loyalty when you must expose information to make a system work. /3

To summarize briefly, back in ye olde days, when we were opening up various Bell markets to competition, potential providers of "enhanced services" recognized they had a problem. They had to expose their proprietary info to AT&T to make the service work. /4

Nor could a customer use the service, like a home alarm or an 'electronic publisher,' without revealing all kinds of information to AT&T that would normally be considered proprietary. /5