Elon Musk has already had a volatile effect after taking control of Twitter, and at least one advertiser - one of Musk's Tesla competitors - has paused advertising on the social media giant to take stock of the situation. General Motors, which competes with Musk's car company, announced it has 'temporarily paused' it's paid advertising on Twitter. However, the company said in a statement that they will continue to interact with Twitter's customer care service.