The internet (ie bandwidth) is cheap, but running servers, providing documentation and tech support all costs a decent amount of money.

However, treating an API as a profit center is a joke. These are literally companies developing software that makes the experience of owning a Tesla better. Making things unaffordable for those companies is putting short term profits over long term success of your product

Can you elaborate a bit more? If I create a passkey on https://passkeys.io on my Mac, then store the passkey in a password manager like Bitwarden, I can log into that site on my phone. I was kinda under the impression that Bitwarden stored the private key on their servers, so if their site gets hacked, then the attacker has access to my passkey.io account?