It's not, it's just premium games, like AppApp.io. Man, I've never seen that site. I searched for something similar before starting this (year long...) project, and I just never found it.
Having read their blog I can say my motivations were just the same. I just feel sad at what the App Store has become. I made this in an attempt to shine some focus on games that use an ethical monetization approach. I know this is a convtroversial subject and many might disagree, it's just how I feel.
Perhaps Apple might one day put in proper features for finding games without IAP (in particular consumable IAP), in which case my site will be redundant. But at least then in the broader picture that would be a hugely positive thing.