#[0] I just tried to send a bug report about nodeless but the captcha crapped out and dumped what I'd written. Problem with adding v4v.app@v4v.app as a lightning withdrawl address I think because of sat minimums.
Discussion
We don't have captcha on our site. But yes you need to be able to receive 1 satoshi, we validate addresses before we saving
You have Google Captcha on your support page.
The spec for Lightning Addresses allows a minimum other than 1. Your site doesnt work with in spec addresses.
Why do you need to verify sending a Sat? Once you get the response from /.well-known/lnurlp that's more than enough to confirm.
The recipient might have liquidity issues or server downtime generating an invoice at any time in the future but that's just part of normal operation for Lightning Addresses.