Nagscreens. You know them. Very annoying. Long story short: I recently stopped updating my subscription to a paid WordPress plugin and it started using nag screens to guilt me into renewing the subscription again. In this specific case we have the UpdraftPlusplugin that I really suggest everyone to use, but it did not really add new features or did anything else to make me feel like having a yearly subscription for the simple backup plugin would be something I want to do.