Twitter is understood to have turned down a US$10bn purchase offer from Google and a US$2bn offer from Facebook, according to reports.
Fortune magazine writer Jessi Hempel claims the offers were made to Twitter in the autumn of last year.
Today, the microblogging site is valued at around US$5bn and has 200m users worldwide.
Hempel’s article presents Twitter in a state of disarray and alleges that despite having 200m users worldwide, less than 20m of them are active users.