Today, the story is different. Domain name registrars realized that they could auction expired domain names to the highest bidder and generate additional revenue. If no one wanted the domain names in an auction, the domains would then drop and become available for anyone to register. Much of the time, however, domain names are successfully auctioned.
A domain name that reaches expired status and is not renewed by the owner will be listed at an auction service (see FAQ for exception to this rule). The domain name does not immediately go into auction, but is immediately listed on the partnered auction service with an auction scheduled for the near future. Such a domain name will be exclusive to that specific auction service.
Thousands of domain names expire every day. The reasons are different. Some owners forgot to renew the domains, some just don't want them anymore or they moved on to other projects. For most people these so called Expired Domains don't have any value. They just see a bunch of Domain Names someone else deleted and move on, but for the people who know about SEO or the value of good Backlinks, Expired Domain Names are money just waiting to get picked up from the street. The only problem is to separate the good ones from the bad ones. That is where comes into play.