Main reason why Google decided not to support DNT is because user data is valuable to them. They don't want to respect your privacy because invading user privac

Main reason why Google decided not to support DNT is because user data is valuable to them. They don't want to respect your privacy because invading user privacy is their business model. Microsoft tracks people too via analytics and you can read about it on their site so you can't say it wouldn't cost Microsoft any money. Only advertising companies would say that DNT opt-in is intended.