Originally Posted by
serpens
The Select card does not need to be listed as the payment method for the 10% points rebate; merely holding the card is sufficient. If you hold the Select card and did not get the 10% points rebate, you should call IHG.
I can confirm this as well.
What I haven’t tested yet is whether the 4th night Free (with Premier card) stacks with the 10% rebate from legacy Select card.