350 Owners Association (Catalina)
I think for the most part his post is absolutely fine.
He is trying to meet other sailors, with his same boat, at a national boat show. Nothing is wrong with that, and there is nothing "commercial" about wanting to start a national organization either.
In his post he told other 350 owners where he was going to be, which was a booth at the show called Everyting Boats For Less. I agree that it did getr commercialized when he listed the web URL, though when I went there it had little or nothing to do with C350''s specifically.