I realize that selling binaries directly or via IAP isn't all that lucrative these days, but plenty of developers still make a living doing it. How, exactly, are you supposed to sell a PWA? I assume they're meant to be a value-add for the main product, which is probably SAAS/subscription/ad-based, but I think a world without a good way to sell software directly—a world exclusively centered around services, not software—would be a sad one indeed.
EDIT: I just remembered that, I guess, Android lets you sell PWAs directly through the Play Store. But if you're not installing them from the web, then what's the point?