Dal sito di uno dei più noti "registrant" nordamericani:

"As part of Google's recent patent application, Google made apparent its efforts to wipe out search engine spam, stating:

"Valuable (legitimate) domains are often paid for several years in advance, while doorway (illegitimate) domains rarely are used for more than a year. Therefore, the date when a domain expires in the future can be used as a factor in predicting the legitimacy of a domain and, thus, the documents associated therewith."

Domains registered for longer periods give the indication, true or not, that their owner is legitimate. Google uses a domain's length of registration when indexing and ranking a Web site for inclusion in their organic search results."

Che ne pensate?