Still need to provide an email?
Here is what I found. It explains pretty well what is possible:
https://guides.getalby.com/user-guide/v/alby-account-and-browser-extension/alby-hub/faq-alby-hub/why-do-i-need-to-link-my-alby-account
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“We have plans on making it possible to use the Alby Hub without needing to link an account.”
I’ll be here. Ready, willing, and able.
It's already there sir!