If the ad appears on the 'Exit page' which you move to when you click the ‘Leave’ button on the Thank you page, it is because you have not changed the ‘Exit page’ setting. If you use the PRO plan, you can specify the page to go to when you click the 'Leave' button on the Thank you page. If you have not changed the ‘Exit page’, you will be directed to the default Moaform exit page and there are ads. Please change the ‘Exit page’ setting on the Collect setting page for the form.
If the ad is displayed on the Thank you page, it is because the number of responses to the ad exposure limit of the PRO plan has been exceeded. When using the PRO plan, ads are not exposed for up to 5,000 responses within the period of use for monthly members and 75,000 responses within the period of use for annual members. If the number of responses exceed the limit, ads are displayed.