Twitter offered $500,000 for a day

In what may be the biggest offer ever for a single banner ad, Twitter is said to have been offered $500,000 for one day of advertising on the site. uSocial.net, which provides a service selling followers on Twitter, claims to have made the offer.
As yet, Twitter does not feature advertising on its site. A spokesman for uSocial.net said it was unsure as to whether Twitter will take up the offer as they may not agree with the content being advertised.