For some companies, it is important to keep a good public image, and for some it's not. But it's always done to maximize their profits, not because of good intentions.
For example: Valve, Google and Facebook all try to be "good," since their target audience are often young, technology-oriented people who care about how good the company is.
But for some corporations, it doesn't matter what their users think. Majority of AT&T customers are average people, who know nothing about ISPs and slow Internet. They just want their "Skype-box" to work.
It only doesn't matter to some, when they managed to get a monopolistic control over the market (like happens to be the case with ISPs). I'm sure many average users are well aware about how bad is a slow Internet or a broken customer service.
For example: Valve, Google and Facebook all try to be "good," since their target audience are often young, technology-oriented people who care about how good the company is.
But for some corporations, it doesn't matter what their users think. Majority of AT&T customers are average people, who know nothing about ISPs and slow Internet. They just want their "Skype-box" to work.