They've been doing that for some time for some Greys that simply lost their MMs, and along with them, their compliance with Rule 15c2-11.
But that isn't quite Calissio's story. It was whacked with a U-3 halt by FINRA. If you recall, late last year and early this year, they moved quite a few Greys that had been suspended to the Pinks. I called OTC Markets, and after spending some time telling me I didn't know what I was talking about, figured it out and moved them to the Expert Market.
They shouldn't have moved Calissio to the Pinks. I see it's traded 174 million shares. If you recall, several of the note holders hadn't managed to dump their entire positions before the halt. So I'll bet they're doing that now.