+1 from me for only using an email address. I was using commento: https://commento.io/ https://commento.io/ which is quite small and can be imported via one lin

+1 from me for only using an email address. I was using commento: https://commento.io/ https://commento.io/ which is quite small and can be imported via one line of java script. However having comments encourages people to leave low-effort responses like "good article, thanks". Email-only provides a kind of filter for low-effort replies.