I see no point in having any other webhosting forums since we have WHT. I see no point in using any other operating software since we have Windows.
Just because ImageShack is the largest and most well known, doesn't mean everyone wants to use it. I run a image hosting site and it has about 1000 users and 10000 or so images. People sign up almost daily.
Would do much better if I promoted it or allowed non-registered uploads.
I use if for my own images because I have total control of it.
Thats another reason to run one.