99.9% of iOS users have probably never heard of apps like app gratis. Much ado about nothing, except for sites like this which have nothing to talk about until WWDC.
And you pulled those stats from where exactly? Don't say it, if it's what I have in mind, because it's against forum rules. And please don't play the blame the messenger (in this case mr) game.
Quite a lot of users are very well aware of apps about other apps, be it review apps, bargain prices apps etc. And what's motivated them to download them was the poor set up of the app store for finding apps. I know one of the first folders I ever made on my iphone was one called apps, where I had apps with free, and reduced price apps and apps reviewing app categories and making suggestions, etc. And that was way back when I had an iphone a few years ago before my switching over to a dumb phone and getting my actual non virtual life back and my attention back to the world outside as opposed to it being on my friggin phone. (but that's another story).
Like I said in my previous post apple, in yet another patently dumb move from John Sculley, sorry, Tim Cook, is managing to alienate a. developpers, b. users, and c. anger anti competition legislators with this move (the trifecta), while d. not yet getting it together to offer a better experience for finding apps in their app store.