Looks like DMOZ pulls out site even after it gets accepted. I had a few site listed in DMOZ but after couple weeks, got them pulled out. I didn't know they did that. I wonder how often they re-review the sites. Anyone else experiencing the same thing?
I've had one site dropped a few months after acceptance, but that's because it violated their rules (it was nothing but a beyond.com affiliate). Other than that I've just a few sites cut down to the root url several months after acceptance (I figured this was just routine housekeeping).
They are emphasizing a big push towards clean up and restructuring right now. I had a site disappear for a couple of days then reappear in a sub category. There is a huge stack of unreviewed as many editors are inactive (big surprise, where's the incentive?)or letting submission pile up, so if you have a site not get in right away, it may not be due to rejection. It may be rotting in a review box. The rereview rate depends on the editor. In order for an editor to advance and get more areas to edit, they must have a squeeky clean category and edit record.
Dare I say that I am an editor at ODP (low level so don't get excited!) I can tell you that there are some categories that get slammed with submissions every day and it is very hard to stay on top of them. I can also tell you that we do re-check sites every so often to make sure the sites are still up and running and that they haven't done a bait and switch. You have to remember that ODP is a directory, not a search engine. There's a big difference.
All we are supposed to be there to do is add quality sites to the directory that meet the guidelines. ODP is there for the web surfers. If a webmaster submits a site to a certain category and meets the requirements and it stays that way, the site will stay in the directory. It may be moved to another category if it is found to better fit that niche, and sometimes we need to create sub-categories because of the volume of sites listed makes it hard to wade through the search results.
However if a webmaster submits a site that either does not meet the guidelines or switches things around, ie: redirect pages to affiliates or whatever, then they will be taken out if they are found by either that category editor or one of the Meta editors.