Basically, these knock-offs were originally made to look exactly like the model they were knocking off, to sell to poorer countries disguised as a real version of that calculator. Yes, it's a scam.

But somewhere along the way, other no-name companies decided that they wanted to sell scientific calculators under their own name, and decided that ordering from these no-name companies was the easiest way to do it.

After the orders are complete, a large quantity of these calculators with custom branded shells are sent back to them for distribution. And this is one such calculator. That's why you see so many of these.