I've recently paid to submit a single page (index) on a few sites at Position Tech. Anyone have knowledge on the extent they will crawl (and index) the rest of the site. Also the amount of time for it to happen. From past experience I have seen a full crawl, but don't know if that is still the case, and how long it took.
If you pay for one page that's the only page I'd count on being indexed. Chances are the rest of your site will be picked up by the free spider sooner or later, but there really isn't a reliable time table for this.