I'm not sure I understand. If we had paying subscribers that were reading your content and we reached out to you and you didn't want anything to do with us we would certainly respect that and not bother you again.
The only way to prevent our users from reading your articles though would be to require some sort of authentication to access them. Same way you block anyone from accessing your content through any web browser or extension.
1. You are taking money directly from customers
2. To serve content that you do not have the right to sell access to.
> If we had paying subscribers that were reading your content and we reached out to you
That sounds like a lot of ifs. It sounds like you're making money directly off access to my content which makes me deeply uncomfortable. If you reach out to me, and you're unsuccessful in contacting me, you're still making money directly off my content whether I chose to monetize it or not.
2. No. We are not serving content. The user's device makes a GET request to your server and you serve the content. Readup just displays the metadata and a link to the article just like reddit or Hacker News.
The only way to prevent our users from reading your articles though would be to require some sort of authentication to access them. Same way you block anyone from accessing your content through any web browser or extension.