Based on latest Q4 earnings, Services is one of the highest growth segment of Apple at 25% YoY (others being Mac at 25%, Other Products at 13%). As the clamor for M1-based Macs subsides, monetizing its existing 500M+ users is the only major revenue-growth area. But what happens if their commission rate is cut in half to 15%? Apple doesn't break out the specific App Store revenue amount or percentage but it must be quite significant.
Hence they're willing to risk these continued lawsuits and regulatory backlash. The day that Services division no longer reports 20%+ YoY growth could well be one when Apple stock faces the reckoning like FB/Meta.