The only way we keep track of users of our free products is with an anonymous userID. If your extension has not been upgraded to Premium, you will see our optional payment page when we release updates to the extension. You can read more here: https://helpcenter.getadblock.com/hc/en-us/articles/9738494074259-Why-am-I-seeing-your-payment-page — Kat C., AdBlock Support