If you are using Reddit's web interface: this is deliberate. They seem to make effort to make it so annoying that people might be nagged into installing the app

If you are using Reddit's web interface: this is deliberate. They seem to make effort to make it so annoying that people might be nagged into installing the app. I assume it works on enough people that it is worth it to them to loose people like me who walk away without installing the app.