Viewmark is one of many providers of Yahoo's Search Submit Pro program (aka paid inclusion, aka trusted feeds). I wouldn't recommend using Search Submit Pro unless Yahoo has problems crawling your site.
quigo feedpoint my guess is the same kind of service, my guess is the answer is the same, but say you have a site with over 100,000 pages.. and also they're answer was that they can get you to rank higher by tweaking the feed etc....You think it would be worth it for ranking higher and getting more pages included or no?
In the long term I think your better off making changes to your site that achieve higher rankings and deeper crawling naturally. In the real world this isn't always possible, especially when working with corporate websites. In these cases sitematch can be very effective and well worth the money.