Why have some businesses stopped buying their brand name in AdWords?

pspan style=font-size: 11.0pt; line-height: 115%; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'Times New Roman'; color: #4c646c; letter-spacing: .75pt; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;Did you know why eBay stopped bidding on their brand name in 2013? If yes, then that may not be applicable to your brand! It’s crucial to interrogate what’s in your brand’s best interest./span span style=font-size: 11.0pt; line-height: 115%; font-family: 'Times New Roman','serif'; mso-fareast-font-family: 'Times New Roman'; color: #4c646c; letter-spacing: .75pt; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;It’s also important to remember that, whilst AdWords can instantly gratify those looking for a higher click through rate or increased traffic, these are mostly short-term triumphs/span/p