It's a circle that right now is spiraling the wrong direction. I hope that the community can come together and improve the user experience around RSS. This in turn will help show the value of RSS to publishers. The current user experience around RSS isn't always very use friendly. On the other hand, the people that care about RSS are designers, developers and journalists. We should be able to turn the tide.
The reply is generated by the server in question, using information available to it.
Essentially, the point here is that WhatsApp is "clicking" the link (to generate a preview) with a resulting connection from the client's device, without user interaction.
So you can send a link to a server you control and harvest the recipient's client device IP, without the need for them to click on it.
Allows to easily audit and download the extension right from the Web Store page.