article_snippet.sent: This comes amid mounting concern that celebrities and sports stars are cashing in by turning Twitter into an advertising platform.
article_snippet.sent: The watchdog has previously banned a Nike campaign featuring tweets from Wayne Rooney, one of The watchdog brand ambassadors, because tweets from Wayne Rooney, one of its brand ambassadors were not clearly identified as promotional messages.
article_snippet.sent: It was the first UK company to have a Twitter campaign banned, after the ASA ruled in 2012 that the use of the  personal accounts of footballers broke the rules.
article_snippet.sent: Both footballers were banned from repeating the messages and Nike was warned about ensuring all Twitter advertising is easily identifiable.
article_snippet.sent: But another one of Rooney's tweets was said to have not breached advertising rules because Rooney's tweets language was markedly different from the footballer's usual Twitter messages.
article_snippet.sent: The Advertising Standards Authority has not yet received any complaints about the promotional tweets for Adidas.
article_snippet.sent: But a spokesman said: 'If we receive complaints that tweets have broken rules, we will investigate. '
article_snippet.sent: A spokesman for Adidas said: 'To Adidas knowledge, there have not been any complaints about the tweets and Adidas have not been contacted by the ASA with regards to this matter. '
highlights_snippet.sent: Top footballers are under fire for using Twitter to promote an Adidas sale .
  