To be able to participate in the rewards program, each Merchant needs a unique CAID/MID. This ensures that a Member's transaction with a Merchant can be identified, and a reward can be sent to the Member.
Most Merchants will have a unique CAID/MID, including Merchants using a bank issued Eftpos terminal as well as Merchants using PayPal, Shopify, Shop Pay and Stripe.
Some Merchants will not have a unique CAID/MID, including all Merchants using Square, which uses the same CAID/MID for all of its Merchants. Unfortunately, at the moment, a Merchant without a unique CAID/MID is unable to participate in the program.
Merchants using other platforms (e.g. Wix) will be evaluated on a case by case basis as they may or may not have a unique CAID/MID.