1. evaluate.me or evaluate.it would be easier to remember.
2. I don't see why anyone would pay $1.25 per response. If I have 10,000 customers, you think I'm willing to potentially put up $10,000 for charity and give you $2,500 to have them fill out a short online form? I don't know...
3. This is way too much for something that should basically be free, since it's very trivial, there are tons of free services around, or it's not hard to whip up even for Joe's PHP loving cousin.
4. The fact that $1 of $1.25 goes to a charity is even more in my face annoying. It's sending the message that you don't really want all my money, instead you're giving my money away. Given that you're so small, it sends the message that you will go out of business soon.
5. You could say that the $1 is there to get people to fill out the survey. But wouldn't people just fill it out just to send the $1 to charity with junk answers, as you mention in your video wrt the iPad?
6. In the video you say that if I just do the survey per email for free myself, less than half will respond? In a pitch, I interpret "less than half" as "about half". That sounds pretty good, I wouldn't think more would respond anyway, and email is free! Anyway, I think you should change the text of the pitch.
Good luck!