They aren't running anonymously, nor pseudonymously.

Here's the founder: https://gitlab.com/Giszmo

Here are the code contributors: https://gitlab.com/walletscrutiny/walletScrutinyCom/activity https://github.com/WalletScrutiny/WalletScrutinyCom/graphs/contributors

Leo has been on a number of podcasts and such. He's still active with the WalletScrutiny project, (e.g., his review of a fix that will let WalletScrutiny be able to, finally, build BlueWallet in a way that it passes as "verifiable"), but I see nostr-related things appear to be his recent area of focus.