Protect Plus Warranty Clarification

I am just seeking clarity on the ring protect plus plan. It says there is an extended warranty. For example, I bought 3 doorbell cameras on 1/1/2020 and signed up for ring protect plus the same day. Say if I keep the subscription going and never cancel it, and one camera has a warranty-covered issue on 1/1/2024, is the camera still covered or does the extended warranty have a definite end? Also, as a separate example, all the facts above remain true, but the doorbell cameras were purchased refurbished directly from ring, does the protect plus warranty cover refurbished items as well? Thanks!