I've always felt guilty by taking for granted the rare breed of virtuous humans that provide free excellent software without relying on advertising. Let's change that and pay, how much would I “lose” anyway?
Aurora isn't a reskinned F-Droid and neiter does it use the same repositories. It's a client for the Google Play Store, but one that doesn't require an account or Google Services. And that's not what F-Droid is.