Since "Free" subscription is permitted for personal use and since the "Thank you" pop up interferes with unattended computers (e.g. see bradtem post January 2021) - have the pop up timeout after some short period of time. Or perhaps consider a nominal fee for such users that find the pop up message to be interfering and should those who chose to pay that nominal amount then make the pop up a time out notice.
Thank you for your consideration.
