Your Citi DoubleCash card is a good rewards card. I have the same card . . . or at least I still did when I checked earlier today.
Most rewards cards specifically deny rewards for purchases which are cash equivalents or which readily can be converted to cash. Those latter, of course, are the lifeblood of any form of MS (manufactured spending).
The difficulty, for CC issuers, comes in attempting to identify which charges to your card might fall into forbidden territory. Specifically, when the issuers seek to use MCCs (merchant category codes) to accomplish such identification, trouble can easily ensue. This is because some MCCs can apply to both allowed and forbidden purchases. And this validates your point, pattyb53. To wit:
While your purchases are legit, they easily might carry MCCs which apply as well to disallowed items.
This leaves the CC issuers in a dilemma. Do they pay rewards on whatever MCC, despite knowing they might be paying on a cash equivalent? Or do they disallow all purchases carrying whatever MCC, knowing they might be denying rewards for purchases which are legit and should be rewarded?
The Singapore rules suggest a possible trend toward the latter approach. When I was denied rewards by NFCU (see up thread) Iām virtually certain it was based on their proprietary use of MCCs, a more stringent approach than other CC issuers back at that time. For you see:
There is absolutely nothing I can do to control the MCC that is assigned to my āpurchasesā. Itās completely outside my control. And, yes, the MCC for my āpurchasesā is on that Singapore list. So to the extent that list might be taken up and adopted by CC issuers here, I am instantaneously a dead duck. And there would be nothing whatsoever I could do about it.