JimW and DaveO had this idea about possibilities for cart abandonment:
I wonder if you could give us a push notification that is triggered when the MemberMouse Checkout Page is loaded and they have entered Member Information. If I get this push notification and it is not followed by an actual purchase I can imply cart abandonment. It will not catch every abandonment but it will catch some.
How about if someone tries to checkout but quits on the checkout page, is there a way to reach out to them if they're already logged in? Or capture emails if they entered it already?