They're not taking from the poorest, they're selling to them. People in low income brackets use services and pay for them, just like everyone else in a market economy.
As a society, we need to stop acting like every business that deals with the poor is inherently evil. Sure, such businesses can have unethical practices, but simply charging people for goods or services isn't one of those practices.
I was not talking about poor people paying for what they need and consume, I was talking about rich people investing in trailer parks just to get richer. They invest with the sole purpose of getting more money back then they put it, taking the difference from the poor.
As a society, we need to stop acting like every business that deals with the poor is inherently evil. Sure, such businesses can have unethical practices, but simply charging people for goods or services isn't one of those practices.