Instant Cashback

How does Instant Cashback work for online purchases? Can I get cashback on websites not listed in the ZEN.COM app? Can I get Cashback by making a purchase in-store or in a store’s app? Are Instant Cashback offers the same for all clients? How to see Instant Cashback offers from another country What is the daily Instant Cashback limit? I did not receive cashback after a purchase Cashback I received for a purchase was returned