Okay, so here's our "official" response:
We were in such a post-ReaperCon rush mode that when we grabbed the tub of triad paints for the Swag Bag, we grabbed the wrong tub. Which happened to be a tub with 2017 leftovers - which is unusual, as we rarely have leftover paints from any ReaperCons.
Sorry. We'd never pull a bait-and-switch on you guys. This was just an honest mistake.
So, if you are one of the unfortunate few who got the 2017 Triad, just contact firstname.lastname@example.org and let Customer Support know you would like to get the 2018 Triad. We'll send those out at no charge. And you can keep the 2017 as a "We're Sorry!" bonus.
Note to all you greedy little goblins out there: you'll need to supply your order number on the invoice that your Swag Bag came with.