Something I didn't mention is that if you decide to pay to have your URL put on directories check the list of what directories it will be on first. Then check what the PRs now are. You may find that directories shown as PR6, 5 and 4 are now PR3, 2 and 1. I do it all myself now, but the other day for fun I asked submitedge.com why they have over optimistic PRs shown on their site. They told me they did have a correct list, but the website list was an old one and hadn't been changed. I wonder why not.