I used to comment on everyone's cards (or try to) when I was at home after having my hip operated on.  Now I'm working again it's just not possible as sometimes I'm out overnight and miss a whole day's threads and even sometimes new things on the specials board (and if they sell out before I get home that is serious).
I know how hurtful it can be if nobody comments (from my own experience) and I agree it does seem odd when hundreds look at a post and nobody says anything.  I used to think just putting a smiley face was a bit 'naff' but actually it is quite a good idea for people who are short of time.
Having said that how long would the threads be if everyone commented - eeeeeeeeeeeeeeeek that would not be good.
Ann xxx