I've never seen that one before, it looks like a good cast.

Two things that lead me to believe it is not a pirated piece is there are very few figure companies that make 1/16 armor figures for display (not RC) and they almost always include a part of the tank as base.
Couple that with the fact that he has it photographed with a model under construction (pirates don't give a rat's arse whether it fits anything), I think it's a tanker with sculpting skills offering his product. There are a lot of talented sculptors in Russia, a bulk of WWII figs are creatted there.

All that said, I'm not endorsing it, don't know the quality of the cast or resin, but I think it's a cool sculpt and you can buy it guilt free.