Don't ask me how I know this, but Argo (and ZigZag, same parent company) both have PlayTech and in fact both started only as PlayTech.
Not sure why you'd be asking about NetEnt and Microgaming because almost EVERY Bitcoin supporting slot casino offers either or both, as far as I can remember. Slots are pretty dumb though, if you ask me. And no, I'm not looking down, I spent a lot of money on slots... but after realizing that there's no way you can know the edge, and reading about all those operators who don't pay Jackpots out, I gave up. Try real Bitcoin gambling... dice maybe.
are u sure about these playtech casinos?
I just looked at both of them and none of them have any playtech slot
any other playtech bitcoin sites that u know?
also, what operators refused to pay jackpots? it seems weird cause jackpot is paid by the slot company and not the casino