Could you tell us where on these Natalee threads that anyone claimed posting here accomplished some specific thing?
Regarding people on the threads claiming posting here accomplished something--I haven't seen that but I have seen the opposite--claims that posting here has somehow hindered the investigation. I have seen many posts from people criticizing somebody else's post by saying something like "Discussing this idea is not helping the case" or "An idea like that does not support Beth/Jug/Dave/Greta/Nancy/etc." As if we here are having some kind of impact positive or negative on the case itself.
It's sort of a pet peeve of mine to read in a thread somebody telling somebody else that they should not have the opinions they have or they should not discuss what they are posting.
Sometimes what is posted here has had an impact--the Dan Rather fiasco and also this is the first place I saw posted something about Cindy Sheehan's family not being on board with her. But I think in the Holloway case we have not uncovered anything of import other than expressing our own interest in it. As far as I'm concerned I do not imagine myself to be part of the investigation and I have read with equal interest postings with ideas from all sides of the issues in this case.