Faceboook monitoring site Inside Facebook suggests that during May Facebook has lost six million users in the US and 100,000 in the UK.Facebook has denied that it is losing customers, saying it is “pleased” with growth, but the social network- which does not usually comment on third party statistics questioned how it arrived at this figure.
Other net measurement firms said they had seen growth over the same period.
The figures from Inside Facebook also claimed that 1.5 million Canadian users left the social network in May.
But overall it showed that Facebook was growing, to a total of 687 million users worldwide with many new customers coming from countries such as India, the Philippines and Indonesia.
Its figures on customer leakage do not appear to tally with those from net measurement firm comScore.
According to comScore, the average amount of time spent on the site was also up, from 21 minutes per day in December 2009 to 25 minutes per day by December 2010.
The idea of Facebook fatigue, where users desert the social network after a certain period of time has long been talked about by experts but remains unproven.
In developed countries such as the US and the UK Facebook penetration is hitting 50% and at that level it is inevitable that users will sign up who aren’t frequent visitors.