Yes, they actually started doing that last year. It's the equivalent of $5/year but with gas fee included that's more like at least $10/year if not more.

https://docs.ens.domains/permanent-registrar-faq

Do we need to do anything to ensure continued use of existing ENS names?

Names that were registered under the legacy registrar expire on May 4, 2020. There is a 90 day grace period during which you can renew the name to retain control of it, extending the effective expiration to August 3rd 2020.
In order to retain your name past May 4, 2020, you will need to renew your name at a cost of $5/name/year. If you don't renew your name, the name will become available for registration by others.