This blog post explains the new updates.
https://www.getbookreport.com/blog/all-time-sales-data
So how exactly do the subscription plans work?
Once your free trial is up,
assuming you're earning more than $1000/month you'll be presented with a form asking for your credit card details. All payments are processed by Stripe so you do not need to worry about security.
If you earn less than $1000/month it remains free.