Magnuson-Moss Warranty Act is very specific to claims of this nature. Here's some of the issues, many of these sites will spam a search index index which after awhile will make your site stick out like a sore thumb for editors to delete. Search Engine webmasters are very familiar with this tactic, including the use of camouflaging urls that all lead to the same place. Very often web contents are stolen and manipulated to increase better keyword placement. This same type of theft will also happen to you as well after a while, I have seen it very often.
Lists are one thing, and search engines are another.
Traffic logs are very very scant on FAA sites, and that is what the bulk of submission services offer.