Only items added on the post-purchase page count, net of refunds and leaving out cancelled orders, in 30-day periods from your first install; reinstalling doesn’t reset them.
If you go over the limit, offers keep showing until the period ends and the app reminds you. If you’re still on Free in the next period, new offers pause until you upgrade. The limit itself is on the app’s listing and Plans page.
Still stuck?
Open the app in your Shopify admin, go to Help and click Chat with us, or email [email protected] with your store’s myshopify.com address.