[drobiazko]

Great analysis. Sustainability is pretty reasonable. There are tons of high quality posts on HN; if you don't gain points fast enough, you disappear from the first page too fast. BetaList has twitter integration which has a much more sustainable effect. What puzzles me is the lower willingness of visitors from HN to provide feedback.

[robotmay]

I've noticed that too; I had a similar experience when I asked for feedback on my project, only with Reddit. I got 0 replies and little traffic from HN (admittedly it was pretty sparse on data and I'll resubmit it soon now that I've vastly improved it), but got some wonderfully useful feedback and 100x the traffic from posting to /r/unitedkingdom. A more specific target market, I guess.