I just got an email saying:

Thank you for being a Feed Wrangler subscriber. This service was created nine years ago when Google announced the end of Google Reader. Unfortunately, today I'm making a similar announcement about the future of Feed Wrangler.

I will be shutting down Feed Wrangler next year, on March 1, 2023. This date is one year since the last member was billed for their subscription. No further membership fees with be charged.