Best way to give away carwashes

[wash4me]

I have a Hamilton Goldline autocashier with Mars acceptors and also the Washgear credit card and fleet system. I am paying a dollar each for the Washgear cards. I am considering mailing a $10 coupon to a different neighborhood each week for my high velocity. If I understand correctly I can use coupons that go in the bill acceptors and I assume these are cheaper than the cards. Any thoughts on this plan or how to do it best?

 

[MEP001]

The Mars coupons are pretty expensive, iirc unless you buy in bulk they're nearly $1 apiece.

 

[Earl Weiss]

Due to cost involved and low redemption rates for direct mail, If you are attended at all I would suggest a coupon that they could bring to your attendant and redeem for the cards or mars coupons or perhaps put an e-mail address on the coupon and you could mail them to whoever sends a request to your e-mail. This would also allow you to capture their e-mail and address for future promotions.