So 30% of code written by users with the extension installed was written with some extension assistance? How exactly does that translate into the claim being m

So 30% of code written by users with the extension installed was written with some extension assistance? How exactly does that translate into the claim being made? Is github asserting the 100% of users have the extension installed? My guess is that some small number of trial users did their homework with it then ran to stack overflow when it did something other than what they hoped.