NB: there are for-profit companies who have a corporate charter to create a net social benefit. They're called benefit corporations: http://www.bcorporation.net/ https://en.wikipedia.org/wiki/Benefit_corporation

Non-profits also frequently serve this role.

There's a bit of confounding of this given the rise in popularity of what's called "Cause Marketing". Socially beneficial activities undertaken by (generally) traditional for-profits. Often seen as a marketing benefit. Not bad of itself, but it's helpful to remind companies that token measures don't absolve other actions.

It's fair to say that many traditional for-profits don't. Inclusive of social networking for-profits.