The American Express Gold card offers a $100 airline incidental credit each year, a benefit which is ending this year of 2021. In order to be eligible for the 2021 $100 benefit, you need to have an account open by February 3rd and have your airline selected.
Per the FAQ on bottom of this page:
For American Express Gold Card Members who opened accounts before February 4, 2021, the $100 Airline Fee Credit will no longer be available after December 31, 2021. Card Members who opened accounts on or after February 4, 2021 are not eligible for the Airline Fee Credit.
All American Express Gold Card Members who opened accounts prior to February 4, 2021 and have selected an airline for the Airline Fee Credit benefit will still be eligible to receive statement credits for eligible airline purchases made through December 31, 2021.
Sounds like even existing Gold cardholders need to have their airline selections by that date. It does default to what you used last year, so that shouldn’t be an issue for existing cardholders.
AmEx launched a new $10 monthly Uber credit which begins this month, February, as a replacement for the $100 airline incidental credit. 2021 is the one year which you can get in on both credits, but again, only those who already have the card and select an airline by February 3rd will get both benefits.
There’s a good signup bonus offer currently on the Gold card of 60,000 + $250. Hopefully if you apply now and get approved right away it’ll be possible to have your airline selected by February 3rd (see these data points).
Hat tip to Chase-ing UR points