I find it a pretty funny coincidence when my old work gets confused for legit Disney clipart and used for actual product design :P
Lesson learned: don't draw licensed characters without expecting things like this to happen.
This happened a few years ago when Loungefly used a drawing I did of Ben Ali Gator from Fantasia (coincidentally from the same series of drawings I did) to make pins and decals to sell through BoxLunch stores and threatened legal action when I called them out on social media.
It's not like I wanted a cut, after all I drew fan art of a Disney character. But the fact that there was no BG check, and someone at Loungefly/Disney got paid to design merch and instead took art by someone else, erased my sig, and used it to sell product. Again, lesson learned.
If anything, all I'd want is just a few of the products. Send me a few pins or Christmas ornaments or whatever, and I'd be alright. Hell, this Hallmark ornament was from 2015 and I just saw it NOW, and I think it looks pretty neat. Not so much pissed as amused and flattered.
I'm one of those artists that's not content drawing other people's characters unless they're 100% on model (call it some weird OCD tendency of mine). But it's one of the drawbacks; sometimes it's TOO on model, and this happens. Have your own artistic voice, and you own it 100%.
Also, looking back on this nearly 10 year old drawing, a lot of things really bug me about this piece, and all the other drawings (*cough*differentsizedhands*cough*).