Well, actually, the guidelines are pretty specific: one website, one submittal. But ... suppose someone begins to see a pattern in how the editors are listing pages -- that is, the page on submarine hymenoptera is listed, but there's an equally good or even better page on supralunar hymenoptera, while the ODP S.L.H. category is weak. Then it's not reasonable to suggest one more page of the site. And if that's accepted, one more.
My thinking is, if you never suggest one page till the last one is accepted, then ... obviously the editors are thinking your suggestions are helping! And if your own procedure causes you to stop TRYING to help, as soon as they stop thinking you ARE helping, then ... I can't see an editor complaining.
What the submittal policy is there to stop, is rampant deep-link shotgun spamming from someone who has set themselves up as the Greatest Authority On, say, Metallurgy Since Tubal-Cain, WITHOUT ANY SUPPORT FROM IMPARTIAL REVIEWERS (i.e. editors). Or someone who has decided that they deserve (and ought to have the power to compel) immediate feedback, to allow them to assume their rightful position as GAOMSTC. But if you have obtained freely given testimony that your best deeplinks are valuable, then ... keep doling out the deeplinks so long as you have the feedback.
And, once you've established a reputation as a valuable content provider and a reliable submitter, then ... there's not even going to be a problem with generating content aimed at internet lacunae, that is, noticing the ODP category on supersonic lepidoptera is sadly deficient, and collecting unique content on that subject to publish on the site.
Or, to put it another way around, that is the way you'd establish a reputation as a reliable content provider and site submitter.
I hasten to emphasize, most sites don't work like this. The door to this submittal approach doesn't have a doorbell, and cannot be opened from the outside. But if an editor freely opens it, a cautious and courteous approach will result in further help for the directory, further listings for the site, and better information for the surfers -- and who would object to that?