It is good. But too long for a flyer. And the dynamic title wont work.

It would also be nice for people to know that nostr already has hundreds of applications and thousands of relays and is growing fast... that it is the next big thing... that it is totally open and free and not tied to any company.   Because I think people will assume it is a product or a centralized thing or maybe some small idea that hasn't proven itself yet.... those wrong assumptions people make generally cause people to dismiss it before the recognize it for what it is.