My in-game buddy told me.
He said he had personally talked with the seller, and since my buddy here was using autoit bot before, it's only natural that he asked the seller about the new bot specification and technical issues such as developing environment, including the platform.
Btw, my buddy decided not to buy it because of an obvious reason ($).
He found the seller from the in-game information board. Never see it myself though, since I'm technically retired.