I am happy to answer them.

Why post on lemmy when you can post it on Reddit? Increased visibility?

Because a lot of contributors and users when the web app launched a year ago were from Lemmy only. A lot of lemmy users use rdx on iOS or web app to lurk on the niche subs that haven’t made it to lemmy yet. Also when I launched the iOS version so many of the users here asked me to let them know when I launch an Android version. I have linked one such thread in the first line of my post.

Why use this instead of RedReader?

1. RedReader afaik was only available only Android while rdx is available everywhere(it’s a pwa too).
2. Better Media viewing, although not as accessible as RedReader I made it initially to mimic some Apollo features like fast subreddit switching etc.
3. Read-Only so focuses on lurking on Reddit only, no way to login. Some people consider this a feature as this saves them time.