I understand what you are saying but something still doesn't make sense.  When I send out, say a coupon, it is reaching 202 people.  Where does the extra 91 people come from?  If they weren't added by me then it would stand to reason that they were added by Square.  So what makes these 91 customers different?  My only guess is that these are customers that I emailed a reciept to but did not add a customer profile.  the other customers that I can't reach, that were added by Square, must have been added by a different merchant???  This is just a guess and it would be great to get confirmation from Square.

Square needs to add a check box on the last page of the checkout that would allow us to confirm that the customer will allow marketing.  Once checked, that customer should be added to our reachable customers.  It is very redundent to keep asking customers for thier emails not knowing if they are included in my reachable data base.

Yeah, I wish I had better answers for you.  I know that if I see a new customer with information like phone number or e-mail address pre-populated, it's because they've done business with another Square Merchant and had provided that info.  Square won't let me have the whole thing because it's not mine...but they'll let me use that info to send out receipts.  I haven't really done much with the marketing module, so I apologize for not being more help.