yes, it can help a bit, though maybe not as much as we think at times. but, with new folks showing up in the forums, it certainly cant hurt.
the best way to promote a submitted filter is in the 'comments on filters' forum. but, to do that best, go first to 'Filters' at the top of your browser and find your filter in the library. then, over on the right, you shld see a line with 'comments' written there. it will also have a number in parentheses next to it, like "comments (0)". the whole is a link. if the number is 0 that means no one has commented on it yet. just hit the 'comments' line and it will post your filter into the right forum where others can then post replies. if the number is greater than 0, then it's already listed in the forums and you can simply go there and post a reply.
If wishes were horses... there'd be a whole lot of horse crap to clean up!
Craig