As much as they criticize Primal for their cache relays, I suspect that it helps lower bandwidth. One major problem with folks who have tight bandwidth plans complained about Nymchat using too much was due to all the simultaneous relays connected. It wasn’t until I built out a relay proxy (sort of similar to what Primal uses) where it could then dedupe events server-side, did the high bandwidth use drop. And then even more, I rolled out a low bandwidth feature to cap the maximum connected relays by the proxy. And still, the bandwidth use could be high for someone in a disenfranchised part of the world where they may only have access to ~1GB data for their plan each month. It has been an interesting challenge.