How? Epic is using money to force exclusivity, it's only natural that the devs accept if they throw enough money at them, can't fault them too much for accepting. Point is the exclusivity is not a natural market effect, it's artificially forced into existence by means of burning piles of money. If Epic stopped paying devs for exclusives tommorrow, I can guarantee you would not see a single 3rd party dev going Epic exclusive. If they bound their Online Services to their Store then maybe some would take the offer. But the vast majority of devs would go back to Steam, even if it meant retooling the game for Steam's Online Service.

If a supermarket chain comes into a city and starts to undercut the competition by subsidising the losses from other stores, that is not a natural monopoly forming. It's a company forcing out the competition. Now Steam is by no means in such a position but it does not change Epic's actions. They are acting in a manner where it is clear they care little for a better developer experience, nor for a better customer experience. They want marketshare. Should Epic manage to snatch the monopoly crown from Steam before they run out of money to throw at exclusives I guarantee you they will start hiking up their revenue cut as mich as possible and lock down their services to be store bound. It's the same old playbook that has been ruled illegal in every other industry but because the gaming industry is currently a natural monopoly no laws against the rpactice exist.

You are a moron