Why would a business not use social media for promotion?

[Brajet]

In all honesty, using social media should be seen as being voluntary and not really mandatory. There are some people that may decide not to use social media especially considering the other sides.

A business that cannot withstand negative comments may not have any business to do with social media. Nobody can control what people say on social media.

Also, someone that can not exercise patience to grow followers may not need using social media for the promotion of his business.