Recieved this offer a few days ago for 4 additional points per dollar in the grocery catagory, making the Custom Cash earn 9 points per dollar for grocery stores on up to $625 in spend! Email is most likely targeted, as I've talked to a couple of other people who have the Custom Cash and they have not recieved the offer. Terms below! 
1This offer starts upon enrollment and will end on 08/31/2022. Earnings associated with this program will equal 4 bonus ThankYou® Point(s) per $1 spent on eligible purchases and may overlap with other special offers in which you are currently enrolled. Bonus points awarded with this offer are subject to a maximum of 2,500 additional points.
Grocery Stores purchases include purchases at supermarkets, meat/seafood stores, dairy stores, bakeries, and miscellaneous food/convenience stores. Excludes purchases at general merchandise/discount superstores; wholesale/warehouse clubs; candy, nut and confectionery stores. Purchases made at online supermarkets or with grocery delivery services also do not qualify if the merchant does not classify itself as a supermarket by using the supermarket merchant category code.
Please also note – purchases made through mobile/wireless technology may not earn additional rewards depending on how the technology is set up to process the purchase. We reserve the exclusive right to determine which purchases qualify for additional rewards.
Purchases must post to your account during the promotional period. Many merchants will wait for a purchase to ship before they post the purchase to your account.
ThankYou Points earned will be posted to the primary cardmember’s account in 1‑2 billing cycles.
In order to qualify for this offer, the account must be open and current at all times. If your account is closed for any reason, including if you convert to another card product, you will no longer be eligible for this offer.
I got it and am so conflicted. Got a similar offer on a different card. I guess I will have a back up in case I spend more than $500 in groceries.
I got a similar offer for home improvement stores. This works well since we have a 6% extra cashback offer on DW's Disco card, so we wouldn't be using Citi for restaurants this quarter anyway.
