kindle fire message : need to renew app license

kindle fire show message “need to renew app license” because kindle fire need to connect wifi / internet.

Particularly free kindle fire app supported by ads. They periodically (?weekly, ?monthly) need to phone home to update the ads. Other apps might need to confirm a continuing subscription, or possibly to check location. Apps with in-app purchasing obviously need connectivity for that to work. Streaming media apps require a constant connection, of course, but very few other apps need that.