I've built a thing: The Cashu mint Round Robin auditor
An app that perpetually monitors a list of mints by randomly sending Lightning payments between them. Forever. The sats go in a circle until all is lost to fees or rugs. If a mint fails to pay an invoice, it is marked with a scary red label.
You can donate Ecash from any mint to add it to the list of audited mints!
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Brendan mentions in interviews that they started building on bitcoin, but the fees were too high (his words, not mine). In my opinion, I simply think they wanted to fund raise with their own token, just like most issuers of shitcoins. i agree with you - there is no need for BAT now that we have Lightning.
thought it'd be fun to outline why i think bitcoin is successful: