H owever the money changers and their equipment, now automated, received special treatment
I may change my view on this. Though Jesus didn't have a problem with the treasury, he most certainly did with the money changers. (Matt 21:12)
I never equated the provision of credit card machines to that of money changers, but now that I think about, are they the same? Why would Jesus be upset over the service of money changers? Likely because there was some sort of profit involved for the money changers themselves in exchanging foreign currency. What's the difference with credit card machines? WTS doesn't charge a fee for this. However, make no mistake... profit is being made. The credit card companies charge a percentage to WT for this (or, perhaps to the local circuit or district... I'm not sure which). Would Jesus have overturned these credit card tables? Would he view it the same, as goods and services being sold in the temple? I don't know. There's a possibility that he would have.
One minor note... this is not being done in local KHs at this time, only at assemblies and conventions.