Users on reddit are trying to organize a boycott of these retailers. They have even joined forces with r/android.
You know that you are screwing up big time when iOS and Android users unite against you.
Why boycott? As long as their new system isn't mandatory, just make sure to use your Amex or Visa/Mastercard Credit Card when visiting these stores...even if your debit card is handy. That way they'll continue to pay the card companies and maybe see that CurrentC isn't what the people want. Just make sure to pay your CC every month as to not incur finance charges.