Most services will offer static IP addresses if you're willing to pay for it, ask your internet provider. I know Armstrong does but I think they're pretty local to the Delaware Valley area. The main reason I have one is so I can control which IP address can access my server, it's a security thing.
I'm seeing something like what you describe elsewhere (and did I get it in an email too????) I thought of it as a kind of a promotional thing that FAA is doing. I'll admit, I play games on my phone (love Candy Crush) and now and then I see the same ad from FAA there. I see it pop up on FaceBook in the main activity feed now and then, too. Personally, I think it's a little misleading to say it's in your cart ... but to say something else, less specific ... is great. It tells me maybe FAA is doing the same to my potential buyers?