According to this article (https://sumanrs.wordpress.com/2012/04/14/youtube-yearly-cost...), about 76 petabytes is stored to Youtube per year. (calculated from the released info, that "one hour of video is uploaded to YouTube every second."). So Petabytes/day is probably doable for them.
If this was a company website or something maybe I would agree with you, but seeing how the draw here is "Realtime" bitcoin, the OP obviously put in a lot of work in the realtime aspect. If you look at the source it looks like websockets + canvas.
Considering this, it seems OP would have needed to rewrite the whole service (he would have needed to write application layer + the alternate html) just to serve those without javascript, which would not be in realtime (and essentially a duplicate service of all the other bitcoin exchange boards).
Whats the tradeoff in terms of development time vs. supporting a small set of users?
I agree, this is a simple site displaying information in a very simple way. It should be very easy to fallback onto other ways of displaying this info.