I'm not sure what you mean by match traded, but the terms "promo" or "pump" have very distinct meanings, and when someone posts that CSGH is the subject of a promo or pump, I simply ask for proof.
A promo or pump comes from a communication that is by its very nature publicized and distributed, so if there is a promo or pump, it's easy to post a link, or even a cut and paste of the promo.
If someone cannot post proof of a promo or pump, I conclude that the claim of a promo or pump is false.