I am stating the facts here. If you have anything to refute the facts let us talk about that. So what is your interest in Dropbox?

No, this is not how we roll here. If you have any association with the company, you put it in disclaimer to reveal bias.

Alternativly you could just point out where he is wrong or show that Tonido isn't a unique player in the market.

I agree, biases should be revealed, but just berating him and not his argument doesn't move anything forward.