Signatures.

In a recent conversation with an escort the topic of signatures came up.
She stated that anyone who mentions another escort in their sig is simply pimping the lady mentioned.
She said it not fair to the rest of the ladies as they were getting air play shall we call it and it was an unfair advantage as all the ladies pay their advertising fees.
She also question the reason for doing it. "Are you looking to get a freebie" which i thought was insulting.
So whats every-ones thoughts on this.
FFS don't ask me to name the escort in question this time.