Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
Search engine spamming is using techniques designed to artificially raise the relevancy of your web site for a search term. As this is quite complicated and the difference between page optimization and spamming is vague, see our spam page for more details. Elixir Systems provides an affordable service for small businesses to increase their Web site traffic while not straying into any dubious search engine optimization techniques (spamming).