Now, giving that you also have issues with the name, May I interest you in Matrix/XMPP hosting provider that you can pay with crypto and invite your friends, called communick?
I am very intetested in paying for the product you linked, so long as I don't need email. I will support your product, even with imperfections so long as you remain attentive to your user's needs (hopefully being a paid product helps in that area)
And for anyone else reading, I became an instant fan of matrix/riot/element because the only thing I needed to sign up to the matrix.org home server was username,password and pass a captcha! No email! Same with HN(minus captcha). If this wasn't but a petty annoyance compared to all the real problems of the world, I would be protesting and holding flag burnings with RFC2822 on the flag! (We all have pet peeves :) )
You can invite other people to join the site, and yes, that is basically asking people to put an email address to notify your friends. I might implement later a referral/voucher system to make it easy to invite someone to join your paid contract without having to provide an email, but this is somewhat of a lower priority during the soft launch. Documentation and easier onboarding are definitely bigger tickets on my list.