Right there's the key line. For about 4-5 days now, every one of these threads has filled in with an abundance of attacks against the non-Apple alternative. No surprise- that's almost a universal rule for all things related to Apple. Post after post about foolishly turning away money is right but implying that these huge retailers are dumb is wrong. There have a
reason for trying to go another way and there it is.
Apple's solution piles on to a long-term leech arrangement that enriches the big banks. Everything we buy with credit cards and now Apple Pay dings the seller a few percentage points in transaction costs. Apparently Apple takes a very little slice of that and the banks take the rest. It's no small change. A retailer with an 8% profit who is dinged 2% (of revenues) in total when they take a credit card (or now Apple Pay), is redirecting 25% of their profit to these banks. Imagine if AT&T, Verizon, etc took 25% of Apple's profits in order to cover their part of making the iPhone business go. Would Apple be dumb for trying to find another way to do business to reduce or eliminate that 25% cut? Of course not, and "we" would be finding great fault with AT&T, Verizon, etc for taking such a big bite out of Apple's profits rather than marginalizing it as "a cost of doing business" and so on.
Apparently this CurrentC is an attempt to somewhat replicate a mobile payment option while (maybe) cutting out the leeches. For consumers, we would still get to buy things at the exact same price (so there's no higher cost burden for us) but the merchant would get to keep more of their profit rather than lose it to gigantic banks who have little-to-nothing to do with the work of driving each sale.
As a point of comparison, visit an

TV thread. There is an abundance of gripes that

TV apps require a cable subscription. In other words, this same crowd cries out for Apple to cut out the "greedy" cable company middlemen with that product. Yet here "we" appear to be fully supportive of the big bank middlemen that underpin Apple Pay... so much so that we are faulting retailers for trying to work out a system to cut them out. Why? Because Apple Pay is built to work with the existing leech system rather than endorsing a CurrentC concept like cutting out those middlemen. There is no more greedy entity than the big banks, but "we" find no fault with them here.
Too bad Apple Pay didn't take on the mobile payments business in a similar way. In other words, instead of partnering with the leeches (and thus offering yet another way to further enrich the big banks), what if Apple had chosen to implement Apple Pay as CurrentC appears to be trying to do (cut out those middlemen bankers)? Then, we could have the great, ease-of-use benefits of Apple's option while helping ALL businesses be more profitable than they can be "as is".
Instead of having to pitch retailers on partnering with Apple Pay, all retailers could keep more of their profits on every sale by encouraging Apple Pay.
Are there things wrong with CurrentC concept? Of course. But the one thing that appears to be better is this goal of cutting out that transactional cost. It wouldn't take a lot for Apple to make Apple Pay also work with CurrentC. Then those businesses wanting to continue to send a couple percent of their profits to the big banks could stick with "as is" solution and those wanting to keep that profit could use CurrentC. For us consumers, Apple Pay would work the exact same way as a kind of UI layer atop whichever method is being used by a given retailer. Quicktime or Safari runs atop both OS X and Windows OSs. Those are very different systems behind the scenes but the part "we" use is largely the same. Apple Pay could work like that too with both platforms.
In other words, Apple almost shouldn't care about the CurrentC initiative. Just make Apple Pay work with that platform too and everybody (except the big banks) would be happy. Many of "us" are treating CurrentC like it's some kind of attack against Apple. It's not. It's just a bunch of companies mostly trying to cut a hefty albatross cost. Apple could help them do that with Apple Pay and the end result for us consumers would be transparent (we wouldn't even know if it was the "as is" or CurrentC platform underpinning any given transaction).