If you've suggested the site once, then thanks.
If you've suggested the site more than twice, then please stop "trying." Sites don't get listed because they get suggested a lot (it's exactly the other way around!).
Sites that get listed, get listed because of the content they contain, not because of any suggestion.
Other sites aren't listed because the content THEY contain, isn't what any editor has been looking for (yet!).
Could anyone here know when someone will be looking for whatever's on the particular site you're interested in? No, really not.