I also rewrote the zPay.live backend in Go. It's not only 40% faster and 70% less compute-intensive but also highly scalable. 

Even with 10s of 1000s of users on your self-hosted version, you wouldn't break the AWS Lambda free limit, which is unimaginable with Lnbits or BTCPay servers.
https://i.imgur.com/GsdV03z.jpeg
nostr:nevent1qqsyaezx8d28urq49y4jc3p82tr8yvhypl2lpg8f560w8e98ne95hqgprpmhxue69uhhyetvv9ujuumfv9khxarj9e3k7mf0qgsvdac80utfn4gvly4fv54la0l6cp0udpptnm3ezzyajkdc44w53lgrqsqqqqqpuuce6r