OK, now we get to another concept. Some services are more unique than others. John Doe's Plumbing Services in Nether Haversack, New Jersey is very very likely to be unique -- for two reasons: (1) there aren't many plumbers in NH, NJ; (2) the plumbers in NH, NJ don't have the vicious habit of setting up fake offices (complete with dummy phone numbers and inflatable office staff) on every street corner all across the world.
The same cannot be said of web developers. There are many of them; and (like lawyers) in the absence of real clients they can drum up business for themselves at the expense of society at large, just by engaging in their normal behavior.
So -- editing in web development categories is relatively strenuous (gotta weed out the vanity domains) and relatively unproductive (lots of sites don't get listed after all the trouble of reviewing them, and -- when it comes down to it, the difference to our users between having 4000 web developers listed, and having 4001 web developers, isn't very much at all.)
Now editors, not being stupid, and not liking to waste time, tend to focus on categories where a bit of work makes a lot of difference, not the other way 'round.
See where this is going? There's no reason to suppose your website won't be reviewed -- eventually. But don't expect it soon. And you have mentioned no reason to suppose it might not be listed -- after the editor has checked all the usual suspicious activity typical of your competitors.
But ... there is certainly no reason to expect this to be a high priority among the volunteer editors.
What sometimes happens in extremely competitive spam-target category, is that it will languish for months or years without significant work -- any work that is done will likely be absorbed in trimming the obvious spammers. And then a group of editors will form an informal "task force" and do a weekend "editing bee" on the unreviewed submittals.
But until then, the relevant question is not "why is my site not unique", but "why would an editor want to work in THIS category, and if someone did, how many other sites would they review before getting to mine?"
Of course, we have no way of knowing the answer to either of those questions.