Subscriptions have gone completely off the deep end. This app[1] is a perfect example of how crazy they can get. It's an app that is completed as far as I can tell and I don't know what more features you could add to it. It's not like blackjack changes. They charge a $1.29/month or $12.99/year subscription. I'd happily pay $10 or even $15 for it but there's no way in hell I'm subscribing to a finished app.
[1]https://play.google.com/store/apps/details?id=com.wftllc.bla...