In your account, go to "Deals & Offers" and then click on the "Airline" tab. You'll see the ones for which you are targeted. You can just click on those. I see a couple in my account right now (Hong Kong to Guam, for example).
My experience post-3/3 is that I almost never receive emails now, regardless of my subscription settings, so have to check there.
Also, many of the promos are targeted so even if you read about them on FT and manually enter the promo code the website won't let you successfully register.