Coinbee, Bitcoin paywall service

Site: https://www.coinbee.io

Demo: https://poc.coinbee.io

Just launched this service pretty recently. I've reached out to several sites that are subscription based asking if they would be interested in using the service where I could find contact information but haven't heard back (they were general support query email links).

How does one go about "knocking down doors" to reach and sign clients up? I've never had to attempt something like this before. While this can be discovered organically I'd like to be able to get clients to sign up and use this service if they're interested.