Even then, 'Unlimited' is pretty much always limited in some way. At least in the US. It's a deceptive term here. 

 slowed down unlimited 😅 

 I actually had a service delete my number (yeah, I couldn't even transfer it out) for using too much unlimited data, which was 30GB at the time. Hearing them try to explain that would have been amusing if not so annoying. 

 Woah!? 

 I got rekt last week, ran out of mobile data while travelling, cost me 40 bucks to extend my data on the fly. Then got rekt again 3 days later.

Its unsustainable  

 Have you tried Voyage? It's text only, tries to not resub cached content and it uses the outbox model to reduce redundant responses. 

 So scaling nostr and saving bandwidth can both be part of the same effort.  Primal doing good work there, but needs to be more appetite in the wider eco system to make it reality.