I've been looking at doing some directory submission for a site. I've found a few niche directories that have some PR and so look like they'd be good ones to submit to, rather than just anything and everything. However, several of them want a reciprocal link back, which is understandable. Thing is, the site has very few outbound links and I don't want to dilute that with 10 different links to directories. So my question is: If I add the directory link, submit my site and get it approved then later remove the link from my site, will I lose the link from the directory to me? In other words, do they check manually that I linked to them, or is it automated and they just pull my link if there's is gone? I don't mind maybe having one or two directory links, but I'd rather swap them out once I've got my own link in the directory.