Might do, but there are cheaper ways. I do not see significant traffic from the directory but as Rumas said:
However, remember that the title and description you'll get for your directory listing can/is the one that's used in the serp. Personally I like to control the text in the results to a certain extend, and I wouldn't risk it with an editor
I have a site I dearly wish was not in Yahoo. If I ask for a change to the title, will I get it? In the UK submission is free, and while the site is a genuine small business, what will happen if I ask for a change. Probably nothing, but then....?