Normal Charges
DBS Altitude Amex S$0.83 = 1 KF Mile

Normal Charges
KF Amex S$1.60 = 1 KF Mile
If with 50% bonus (min S$5K spending for the yr):
KF Amex S$1.06 = 1 KF Mile

SQ Tix online Charges
KF Amex S$0.80 = 1 KF Mile
If with 50% bonus (min S$5K spending for the yr):
KF Amex S$0.64= 1 KF Mile

The bad part about the KF Amex is the miles are credited to KF account every month, so making the miles expire in 3 years' time.

As for the DBS Altitude Amex card, you accumulate the points with no expiry. Convert points to miles as and when required.

So all-in-all, I guess depending on who are the cardmembers and their spending habits. Those who spend more on online SQ Tix, then the KF Amex is the way to go, otherwise, any other charges DBS Altitude would have the best value in town.

I have given my feedbacks to KF Amex about all these promotions by other banks and card companies which gave better value than the KF Amex. Notably last year's OCBC Titanium MasterCard offer during the Great Singapore Sales of getting 10x points.

KF Amex has not come out with any promotion for the longest. I think the time has come for them to do something about it.