Thermal Scope is Bulls**t

So, I've played a couple dozen rounds of PUBG at this point, FPP, solo. Im not an expert but I know the basics. Not once in all those games have I come across a "Thermal Optic" and last night I made it to top 6 in a round when someone got me using the thermal optic. There is no way he would have seen me if he was not using an optic which is almost a wall hack.

Question 1: Has there been discussion in the community about this attachment being unbalanced?

Question 2: How do I get one of these pro-scopes? Like I said, I have never seen one while looting.