In-App makes sense. I’ve recently purchased a good amount of not-free apps but the only in-app stuff I’ve purchased has been “pro” versions of free apps I’ve downloaded. I’m guessing the former don’t count.
Would things like Evernote subscriptions count towards that?
If purchased through the app and you were billed by the App Store (i.e. you were asked by iOS to use Touch ID/FaceID/Apple ID password) then yes.