Originally Posted by
exwannabe
The "Giftcard Trick" was before the days they started these offers to use the AMEX credit on tickets.
Back then, it was almost impossible to spend the AMEX airline credit on DL, The "trick" was that if you paid for a ticket with a mix of DL gift card and AMEX, the AMEX charge showed not as an airline ticket, but as an add-on charge, Thus counted under the $200 credit.
No idea what is true as of today.
I believe you're talking about the additional collection monetization method for the (unbranded) Plat//Gold airline fee credit, but I think the previous discussion in the thread is asking about the DL Gold AMEX signup credit.