I think, it’s generally rather about devices sold than about the particular profit you draw from it, because if you only satisfy e.g. 30% of the demand, that still leaves plenty room for competitors to build up their business. But if you cover e.g. 90% of the demand, it becomes very hard for competitors to find customers.

But yeah, antitrust laws are very loosely laid out and pretty much entirely up for judges to make judgements.