Americans are not willing to pay to use Twitter, according to a study last week by the Center for Digital Future at USC's Annenberg School for Communication & Journalism.
The survey of 1,981 internet users in the US found that 49 per cent of respondents have used free microblogging sites such as Twitter, but zero per cent said they would pay to use it.
The study also found that half of them never click on web advertising, with 70 per cent saying they find it annoying.
Jeffrey Cole, the centre's director, said that such an extreme finding shows the difficulty in getting internet users to pay for anything that they already receive for free.
However, 55 per cent said they would rather see web advertising than pay for content.
"Consumers really want free content without advertising, but ultimately they understand that content has to be paid for -- one way or another", Cole added.