That's the beauty of Relays as Communities:
1. You're more likely to be invited/onboarded to a community directly. Avoiding all the biased recommendations Big Clients inevitable make in their onboarding.
2. Big Clients can hardcode Relays all they want, the Community is king and sets the rules. You cannot interact with the Community "on the Big Client's relay" lol 😜. (You can only share/quote/embed stuff from that community to other Relays, which funnels people back to the Community, with their own rules, prices, hosting, ...)