TPG notes AMEX Marriott cards now have offers for 10x points on gas, dining, and Marriott stays, through Oct 31.
You activate three Offers to the card, to boost earning in each category. Limit is 7,500 spend across all three categories but it's a pretty good offer.
I miss SPG too @coldfusion 
Thanks for sharing OP
I glanced over that same email offer. Thanks for the details
@coldfusion wrote:As a side note, I miss my SPG card.
I miss earning SPG and spending Marriott. 7.5 to 8% back on the upper end of 5 digits of spending added up.
I got all 3 offers on my Brilliant card as well. Guess I'll be moving restaurant spend away from Gold and gas spend (all $30-60 a month of it) away from CSR for the next 12 weeks. Really wish the offers were good through the end of the year rather than Halloween, though. My hotel spend isn't likely to be much.
@cashorcharge wrote:Not sure if you were a part of it before @K-in-Boston but....I too got that email about the new Marriott/Restaurant/Credit Card register program where you get points for using any credit card, anywhere as long as you register it and it's at their partner restaurants. I thought okay, I'll use this...and registered all the cards I use for dining out in my rotation right now...incidentally....those cards were ALSO registered in a similar programming with American Airlines...their "Advantage Dining" program and as the Marriott program registered....I got "sorry you removed your card from "Advantage Dining" emails immediately after. Apparently...and perhaps I didn't read the fine print...but I am guessing the program is managed by the same 3rd party provider and you can't have a card registered in both programs...I had no idea.
Yes, almost every major dining rewards program is done by Rewards Network and each card can only be used in one program at any given time. The Marriott program isn't really that new (I want to say it was introduced back before the SPG merger was final), but they've been advertising it a lot more lately. I started using Rewards Network with Southwest then changed it to Delta a few years back, and with VIP status I was earning 5 SkyMiles per dollar. When Rakuten launched theirs, I switched it over because 5 MRs are more flexible than 5 SkyMiles (and I can always transfer MRs to SkyMiles 1:1).
Amex, Chase, BOA, etc. offers with the same restaurants of course stack, and sometimes there are other things that will stack as well like Groupon+.
@cashorcharge wrote:Thanks! I hadn't heard about the Marriott program until this week. I don't recall if I ever got the notification from SPG years ago.
Thanks for sharing!!!
I had to go back and look. My first email about Eat Around Town was from last October, but I know Marriott had a dining program earlier (maybe it was short-lived and didn't pan out, like their shopping portal). I don't recall Starwood actually having a dining rewards program.