I'm an FAE in EDA, and have known Mark for many years. Obviously his presence on EDACafe is a way for him to increase his visibility. I don't see a problem with this - recruiters definitely have a role in EDA, both for the candidates as well as the companies.
Mark's article represents his view of DAC as a professional recruiter. He knows who's hiring and who's not. Of course he views DAC a as place to meet people and build relationships. What's the problem with that?