I haven't heard this term before, but maybe that's just me:

"... it became clear that ad retargeting—in which you show ads to people who recently visited your website—was where MARKETEERING dollars were going" (emphasis mine).

That's an interesting turn of phrase: it evokes Disney's Imagineers, who can be loosely said to be engineers with a heavily creative bent, and applies it to the act of marketing, thereby implying a more heavily creative and technically adept form of "marketer". I wonder if "X-eer" is an inchoate language trend?