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Spammy categories are a pain to edit, so editors tend to ignore them. Esoteric categories can be the best or the worst -- the best if there is an editor who shares the interest, the worst if none share the interest.
Contacting the editor directly usually does more harm than good. Editors are encouraged not to reply to submitters: there is a long rich history of submitters acting poorly when they don't get the answer they want.
And if you submitted to another category within the first 30 days, start counting another 30 days before posting to the forum.
Do not resubmit. It will only may you wait longer.
On the other hand, I've seen sites added within couple of weeks to high PR categories. It was done by SEOs who claim they specialize in submitting to DMOZ.