I mean, most noscript users are invisible to analytics, so even if there was a lot of us, which there isn't, nobody would know :-)
And also the worst pages which abuse javascript the most, and where users would benefit the most from noscript have negative incentive to allow that as it a lot of the bad JS is ads.
Sorry for turning this into a rant about general things instead of your app. I have a lot of feelings about this :-)
One idea for your app though, what do you think about a shared broken-blocklist? It's something I considered a few times, as displaying a white page isn't great UX. And without great UX the critical mass of people without JS enabled will be hard to reach. So my idea was to have a blocklist shared between either all users of an app or all noscript solutions. I think the UX would improve if we could just show a informative error message instead of a blank or mostly broken page, and crowd sourcing a list of pages which won't work without JS might be the way to go?
A blocklist sounds like a great idea. It would definitely help corner that case.
In NoScript.it, are you using an existing open source list or building one out?
As for noscript.it, I'm not aware of any existing lists, I have a short hard coded list so far. If you start a list I'd happily use and contribute to it :-) On noscript.it I have an additional problem in that not all sites allow embedding into a iframe and some block the cloudflare proxy I use to get around that. I maintain another list for those pages, but it probably breaks for a lot of other pages also without any useful error message to the user.