[jahewson]

Anti-trust law (where "trust" is an antiquated term for "cartel") is all about preventing multiple companies from conspiring to price-fix or monopolise a specific market via non-compete agreements and the like. For example Microsoft's famous agreements with OEMs to bundle IE and not Netscape. Having a monopoly is no sin, and Apple are no more obliged to sell non-Apple software for their phones as they are to sell non-Apple hardware in their stores.