Praising a scam in your signature makes you a scammer in my book, no matter the intentions.
Funny, I guess people like you mean that I really do need to change my text under my name to "signature is a paid advertisement, not personally endored". I figured that was too obvious to worry about.
No need to change anything, I would not take investing advise from anyone on this forum.
Still, I compare getting paid for signatures to getting paid for praising something in real life. It means that you are for sale. And here it is pretty cheap.