Your constant promotion for upgrade is an AD,
Your in-app purchase option to persistently remind (advertise) a feature that people don’t want and will never EVER buy AFTER they ALREADY paid you to remove advertisements is deceptive. It’s not good marketing — it’s dishonorable, lacks integrity and is an excuse for lazy programming. Do the right thing — stop the in-app purchase POP-Up AD that appears when one opens the app for those who paid to have advertising removed. What is it, one or two lines of code??