Most likely sourced from CTH who misconnected some dots to reach a conclusion that fit their narrative.
How do you know he is not?
Both Carter Page and the FBI have stated for the record that he was a cooperating witness in their 2013 investigation and I see no reason to doubt them.
But if you have new evidence to the contrary I'd be happy to take a look at it.
If I can find, I’ll post. Too much going on in news and my “real life” at the moment, plus electricity surges so have to turn computer off. Maybe tomorrow...