Does Linda Yaccarino regret teaming up with Elon Musk yet? This time last year Linda Yaccarino was flying high. She had a prestigious job spearheading ad sales at NBCUniversal and a reputation as one of the best in the business when it came to building relationships between brands and agencies. She was known in advertising circles as the “Velvet Hammer” because of her smooth but hard-nosed negotiating style. She was successful and respected. Then Elon Musk came knocking with an offer of the CEO job at X (formerly Twitter) and she seemingly thought, hey, why not, let me go ahead...