I haven't actually voted, but your reboot tag just got linked by someone on my flist as being a great source of ST11 recs, so if you're seeing an influx of new people, that's probably why.

And they're probably not commenting because they're not on DW; it took me several minutes to figure out how to comment without a DW account, and I would have just given up except you sounded like you really wanted an explanation! I suspect DW comment rates are going to stay quite low until everyone who doesn't have or want an account has some impetus (like this was for me) to figure out why they aren't allowed to comment. (You, for instance, have disabled anon commenting, which is totally understandable, but means that to people who aren't logged into OpenID, it looks like there's no option other than getting a code and opening an account. It wasn't until I worked through the whole "WTF is OpenID?" thing that I saw that you actually DO allow OpenID commenting; it looks just the same as the anon option, ie not available, to people who aren't logged in.)

Sorry for the confused exposition, but I hope this explains the random people!