The reason Keychat is so adamant about using Bitcoin ecash as stamps is that free services are unsustainable.
A blog post by Signal from last year discusses the costs and losses involved in running Signal.
"We estimate that by 2025, Signal will require approximately $50 million dollars a year to operate.”
https://signal.org/blog/signal-is-expensive/
$50m 👀
nostr:nevent1qqswzajml6tdgzqqucpxzxc9pkcmt94960dlv8jdehj4zhhufc7q7cspp4mhxue69uhkummn9ekx7mqzyzaljga2jfrqvhugcsx8mxlkrnxvplelelcxt2xt9l6vlwmzpz83uqcyqqqqqqg8azsgd
This is what you need to write about on your website, you need to educate people.
Anonymous systems need (often very small) fees. Fees don't need to harm your privacy. The internet is broken because there's no good way to make small and private payments for services you use. This has been an issue from day one.
Ecash fixes this.
nostr:note1u9m9hl5k6syqpeszvyds2rd3kkt2t57m7c0ymn092900cn3upa3qe4s2zm
This is a really really good idea.