Selling product and personal attacks are two different things. Either way, I think you would agree if what is currently going on was an attack on Gary or Mario, the topic would be immediately removed. Back to the same unfair moderation here.
Why not post examples of work instead of trying to insult your competition? In the end, negative publicity isn't always good publicity. This is a very word-of-mouth business and people don't like to hear you trash talking other people.