is lightsata your go to right now?
nostr:npub13qv9uflfdn70c0zcccju7uxymwn407xjax4he2uq75qj5dp7klfqt74rrf is already free and provides great onboarding content for newbies, with times reversion to grantor. But it's still custodial, afaik. So, with nostr:npub1mutnyacc9uc4t5mmxvpprwsauj5p2qxq95v4a9j0jxl8wnkfvuyque23vg you are paying for a fully self-custodial flow.
Discussion
Have used nostr:npub13qv9uflfdn70c0zcccju7uxymwn407xjax4he2uq75qj5dp7klfqt74rrf a lot, yeah. Allows you to generate physical cards with QR codes or word codes to redeem, which you can hand out to Uber drivers and bar tenders.