Speech discrimination is just another form of discrimination, and whether you can compel an individual acting as a sole proprietor or a family business to do something is a different question than whether you can compel a multi-national megacorp to do something. I don't know that "20 employees" is the line to draw, but it should be obvious on its face that a small business and an MNC are not the same, and they operate in society under different reasonable standards.
Speech discrimination is just another form of discrimination, and whether you can compel an individual acting as a sole proprietor or a family business to do something is a different question than whether you can compel a multi-national megacorp to do something. I don't know that "20 employees" is the line to draw, but it should be obvious on its face that a small business and an MNC are not the same, and they operate in society under different reasonable standards.