I have a numbe of sites with thousands of pages in Google index. What you get is links to your homepage and internal pages with up to 100 different anchors. You'll get one link spot on each page of the site you pick. Your link that shows up on a page will remain static but on different pages different links would show.
Using this you can get your site deep crawled or target for different keywords.
The sites and corresponding monthly rates are shown below.
If you want links to more than one domain, each additional domain will be $1 extra per month per site. The number of links is limited to 100 though. For multi-site purchase; you get 5% discount for 2 or more sites, 8% on 4 or more sites and 15% for all sites.