Brilliant email from Amex about offers included this, to transition people's cell phone CC to their Amex. So, so, so smart.pic.twitter.com/p8hi6BiGGi
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And then, from Amex's perspective, the fat interchange over the customer lifetime at a cell phone provider. ~3% x ~$60++ / mo * 4+ years
You need to deduct the cost of service from the interchange fees... reward points even if nothing else.
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