Twelve.cash is still custodial and their db sees every invoice request, payment attempt, logs your IP, timestamps, amounts, and username metadata. You'd reduce this significantly by running your own Phoenix node and generating bolt12 from there.
You might get particular privacy, but not universal, and the custodial risk isn't a small issue. So sure, you hide it from me, the Boogeyman, but not from potential in house threats.
Tried sending you sats..

