Apple has built a closed ecosystem around its devices and its operating system. Apple controls the gates to this ecosystem, setting the rules of the game for anyone who wants to reach consumers using Apple devices.
According to the WSJ, “once the new law comes into effect, so-called gatekeeper companies could face fines of up to 10% of their global annual revenue. Repeated infringements could raise the limit to 20% or lead to a ban on some acquisitions,” all the while the Silicon Valley giants are in hot water over in Europe over what the EC perceives as anti-competitive and monopolistic behaviour on numerous other fronts.