Nope. Read the link provided earlier that demonstrates additional points do not make something wrong because a source is biased.
It applies here.
Legitimate use
Appeal to motive is a logical fallacy. However, motive can be highly relevant in practical discourse: when almost all the proponents of position A seem to support rather more odious position B, then it's a useful heuristic to check out whether B is actually the goal. e.g. Holocaust denial is, in practice, overwhelmingly just neo-Nazism dressed up as a mere question of history. Similarly, much of the denial of the health effects of tobacco was funded by tobacco companies.
If one can prove the opponent's argument is false, and that they have an ulterior motive for making the false claim, their entire position is much weaker. But to argue robustly, you need to show the actual argument is wrong. Simply being indicated as having a conflict of interest does not make one wrong.
You can shout all you want, i have shown where it is wrong, there are not enough coefficients in your second equation. Or did you not notice that?
And can i ask what has this to do with the thread or are you simply attempt to derail it further?