You obviously haven't used it. That's the problem with you, and the many like you. These "I've never even heard of it, so it's a waste..." comments only prove ignorance. Many (millions, as mentioned) find value in an app discovery app like this. I won't waste my time to fill you in on what this app has to offer, nor how it does it, or any other details about why it's useful. There are plenty of truly useless apps in the App Store, but this wasn't one of them.
I use it, and I'm glad the functionality of it seems to still be intact.
Apple is slowly pushing away users/customers. If I didn't love every piece of my Apple pie for many reasons, I'd strongly start looking at alternatives. Sadly, there isn't one other platform I'd even consider for many reasons. As of right now, I have more reasons to stay with Apple products than I do to leave the ecosystem. Time will tell if Apple pushes me (and others like me) over the breaking point.