You can use 4 approaches to notify your end user about available deals :
1. By email, message or notification :
2. By displaying widget each time your user has to confirm a transaction / payment :
Jackpot's widget can be integrate in any Html page. This way you can choose to display it on any confirmation page related to your payment flow. Widget is displayed each time your user has to interact with your website and still can choose to get his money on a traditionnal payout.
3. As an option in your user's payment configuration :
You can choose to allow your user to choose to always see the Jackpot's widget instead of requesting payout. This way, Jackpot's widget should be displayed to your user each time he might need to execute a payout.