That's one of the ways anti-trust works, yes. If you're just a business doing a thing, no problem. If you get so good you become a de facto monopoly in some are

That's one of the ways anti-trust works, yes. If you're just a business doing a thing, no problem. If you get so good you become a de facto monopoly in some area, and start to exploit that dominant position in whatever way, it's time for regulations or a forceful breaking up to constraint you.