Can't speak for the entshitification but actively punished unsubscribed users?
I've been using it for two months, learning Germans, I just use Firefox in android instead of the app and I get no ads, only 5 failures but I rarely reach that on a daily basis (I don't want to burnout and I'm pretty sure it's better for learning to not go too fast) and if I ever reach it, I currently have 1k gems. I'm actually surprised at how little use I'd get out of the subscription.
I see she's practicing her next outing at the cinema in that picture