Because it wasn't marketing, it was a job opportunity. They wanted to give him money for services. To me, even if I dislike someone, if they approach me with a

Because it wasn't marketing, it was a job opportunity. They wanted to give him money for services. To me, even if I dislike someone, if they approach me with a business opportunity I'm going to treat them with respect and dignity. Out of principle, I might decline their offer, and if I felt strongly enough I might explain why, but I'd do it in a way that's private and saves face for everyone.