Yes and no. I'd maybe try to rephrase that to something along the lines of "I've looked through their site and I haven't seen any evidence of them attracting users". Dismissing a rival with "meh, no-one uses it!" makes it sound like you haven't really considered the competition.
And if you don't have a list of damned good reasons why no one uses X, then they shouldn't give you any money.
BTW, I don't waste too much time concerning their success (just a once a month check) especially since my company's success is most important. No one asks "Isn't your company just like X" when you are winning :)
A really simple graphical explanation about who pays what might work? I really don't know, but what does peak my interest is that it seems like it will be a variety of crazy stuff rather than another lesson in math.
I liked the comment that you should start your pitch with what others are doing and how you will address a different market or beat them in their own market.
This stuff is obviously really tricky, but I feel like you have something you just are not showing.