>The ODP submission guidelines used to say to do it every month, but this has been rendered unnecessary by changes in how the ODP works.
That's not a FAQ, that's a PRM (pervasively repeated myth.) The ODP submittal guidelines haven't EVER said that, and ODP submittals have NEVER expired.
>Once a submission has been received, it will never go away. It will sit in that category, awaiting review. Submissions do not expire.
You failed to mention whether they might obsolesce, rot, decay, tarnish, depreciate, amortize, deliquesce, vaporize, emigrate, perish, escape, ...
Rather than a belabored exposition of all the things that the ODP is not like, or all the ways in which stupid blatant violations of the submittal policies may redound upon the hapless heads, or alternatively the vital organs, of the violators -- we have a different approach.
We tell people how they can help us, if they want to.
And if people don't want to help, they don't have to. But if they aren't helping, we'll ignore them.
People are welcome to use whatever tools they can find, to work on whatever they wish -- but the dmoz.org tools really only work for helping the editors (and people who're trying to help them).
For instance, duplicate submittals (a-la the 1998 Spam-AltaVista-Out-of-Sites technique) don't hurt us. So why would we worry about them?
Google takes the same approach (although with different techniques): you can submit your site twice a day every day, and ... Google calculates its rank the same way. They don't worry about retraining the spamming brutes, because brutal spam doesn't hurt them.
The current approach works for people who read and follow the submittal policies. It doesn't work for the illiterate, importunate, or irrecidivist. But ... which of those categories would be addressed by yet another (albeit impressively redundant) answer to the most UN-asked question about the ODP on the net?