The chief executive of X, the social media platform formerly known as Twitter, has moved to repair the company’s relationship with advertisers by reinstating a “client council” for marketing and ad agency executives. Linda Yaccarino wrote on the platform on Thursday that it was “officially bringing back the client council in the fall”, as the business seeks to reverse an advertiser boycott that has hit revenues since it was bought by Elon Musk for $44bn last year. Musk admitted last month that cashflow was still negative amid a 50% slump in advertising revenues. Yaccarino, who was a highly rated TV...