Nothing prevents the event itself from being re-broadcasted and like most similar legacy services nothing prevents paying users from saving the content to their machines and re-sharing it elsewhere.

However, creators will have access to our file host that will only unlock files for authorized users by IP initially and then eventually by NIP-98 when more widely supported. 

This way, even if the protected event is leaked by one of your subscribers, the links in the event will not work. We also support PPV links with embedded streaming video (instead of just serving the file) to further minimize unauthorized redistribution.