Jack Dorsey: Twitter co-founder breaks silence on Elon Musk takeover- PublishedTwitter co-founder and ex-CEO Jack Dorsey has addressed the mass sackings at his former firm, apologising for growing Twitter "too quickly".I own the responsibility for why everyone is in this situation: I grew the company size too quickly.Back in April when Mr Musk first began his purchase of Twitter, Mr Dorsey said the 51-year-old was the "singular solution I trust" and that the South African's takeover was "the right path...I believe it with all my heart".A host of major brands have halted advertising spending with Twitter in recent days, including Volkswagen, General Motors and Pfizer.Almost all of Twitter's revenue currently comes from advertising, and Mr Musk has been looking for ways to cut costs and make money in different ways from the platform."