Yes, the poster is from the UK where companies' names like "Posterous" are considered plural: http://en.wikipedia.org/wiki/American_and_British_English_differe

Yes, the poster is from the UK where companies' names like "Posterous" are considered plural: http://en.wikipedia.org/wiki/American_and_British_English_differences#Formal_and_notional_agreement http://en.wikipedia.org/wiki/American_and_British_English_di...