I have, can’t remember what the reason was for me not to use it.
Discussion
nostr:npub1tjkc9jycaenqzdc3j3wkslmaj4ylv3dqzxzx0khz7h38f3vc6mls4ys9w3 appreciate all your work in Africa. You beeing a role model it is a great move to go with nostr:npub1235tem4hfn34edqh8hxfja9amty73998f0eagnuu4zm423s9e8ksdg0ht5.
Can I suggest to rethink your Protonmail setup. They might be a honeypot and regarding privacy/sec there are better options:
https://disroot.org/en/#services
They have may services incl. E-Mail at no cost. More important they support freedom tech. since long.
Another option is https://riseup.net/
See also this thread