I have no idea where all of the queries come from. We do no advertising, no ad words, no ANY-THING, but we get tons of queries each month. It started out that 9 out of 10 queries were horrible. But that isn't the case now.
If we haven't sent an email saying that we are passing or it isn't a good fit, or we don't publish that (didn't you read the submission guidelines???), then Judith and I are working our way though the stack and your submission is still pending.
I suppose the only good thing about that is we don't take vetting lightly and we give your submission a serious reading.
So chin up. Keep sending out queries (don't put all your eggs in one basket) and keep the faith.