Even Costco accepts American Express. But as soon as WalMart or BestBuy announce that they will no longer accept credit cards, but only debit cards, cash or CurrentC, then I'll start the popcorn. That will be fun to see.
The killer for me is that these CurrentC folks want DIRECT ACCESS to my BANK ACCOUNT !!
You can't use a credit card.
So, they want me to give them all my personal data, to have and to hold on systems with who-knows-what security, and also let them pull money directly from my bank !!
There's a good reason I never use a debit card in stores. Only at a bank ATM. It's the same reason that says that this direct-access plan is stupid.
Consumer Cellular (MVNO with AT&T service) DOES allow tethering, but doesn't mention it on any of their plans. And it's free. You just have to call them and ask for it. They warn you that tethering can run up your data bill, and that's certainly true, but will enable it for you if you want it.
My data usage is mostly WiFi but I do need access for MBP occasionally. For me this is a great solution.
Research can't tell you everything. For example, it still hasn't told Apple what the iPad update cycle will be like. We now know it's longer than the iPhone cycle but not much else. I agree that some iPad Minis will turn up as iPhone 6 Plus sales instead. But then why keep the old Minis around ? Even back to the original ! There's something else going on here that we haven't yet understood.