A better test is to see if the author stands to financially (or other ways) benefit from the posts future predictions coming true. They also fail this one.

That is also an influence, although that has a risk if one over-indexes on it and getting into tunnel-vision territory.

If the opposing view is indeed correct and I dismiss them just because they voted with their feet or money, that would be unfair and damage building a diverse view of the debate landscape and opinions.