Because these are for profit companies. What is actually happening when a company says they want to work to make a difference is that they want to harvest your

Because these are for profit companies. What is actually happening when a company says they want to work to make a difference is that they want to harvest your enthusiasm for improving the world to make them more profit, or create free marketing for them. When choices come down to make a difference or make a profit companies choose profit. If they truly wanted to make a difference, they would be nonprofits.