I use it in a side project. Reasons: * B2B. The project is targeting companies where everyone relies on email. * It is easier to implement. Compared to normal

I use it in a side project. Reasons: * B2B. The project is targeting companies where everyone relies on email. * It is easier to implement. Compared to normal email/password-based authentication systems, it is almost exactly like the email verification step but it does not need any "forgot password" or "change password" functionality. * Access tokens are temporary. If your DB ever gets hacked, the tokens are not valuable in the long run. * Makes account reusing by multiple people more complicated. This is especially useful when your project uses seat-based pricing. * Cheap "SSO". You can only use the service as long as you have access to the email address. This might be interesting for companies. People who leave automatically lose access (as soon as the token expires).