no sure, you have no way of having any checks whatsoever that they don't just log your nsec into some db, but it's fine (and don't fucking start with FOSS, its the biggest bullshitware joke out)
https://image.nostr.build/171884308c05087d0f113ba6fa7e9da6715c3193362f65cb34f0b6c3544e2c11.png
There's not one single person that uses Nostr now that doesn't realize that it's very technical still and has a lot of room for improvement.
Not liking a FOSS is a weird flex though.
two. years later and we got shit to show for it except for all the purple-washed kumbaya