I see you still don't get how it works. There are two options:
You buy it outright. Then this version belongs to you, and there are no subscriptions.
Or, you buy a subscription. After 12 months, you are using the current version of Jetbrains, and the version from 12 MONTHS AGO belongs to you forever. With a subscription, the version belonging to you will always be 12 months older than the current one you are using right now.
Most people don't seem to understand that, do the subscription, and as they never understood what they really signed up for, are happy.
It's not even unethical by Jetbrains, it's perfectly fine and OK. But it IS a clever trick.