Divide and conquer
When Standard Oil was crushing everything and everyone who stood in its way, it was originally thought of as "good" for the consumer. S.O. lowered prices for users and made LOADSAMONEY for its investors.
The commercial terms it drew up for anyone it dealt with tended to be by diktat (take it or leave it - BTW, if you leave it, forget about doing business with anyone else) and rather one-sided in setting out who got the benefits.
It was only when things got so extreme that the US government stepped in and broke the outfit into smaller pieces.
We can see parallels with the Ts & Cs that a lot of the larger internet players are forcing on their customers. A lot of them are so big that, in practice, there is little in the way of alternative suppliers. They are also so big that their legal beagles can effectively call the shots unless and until a complaint gets appealed to state level (by which time the complainant has probably run out of money, anyway).
I suppose in a capitalist state (the Internet, not just the US), this sort of behaviour is inevitable. After all, there are no laws in virtual-land and business is very one-sided. It's just so sad that after S.O. and it's many copy-cats (e.g. IBM, Microsoft) that such situations are still permitted to develop. Even though we can all see, in hindsight, that they are bad ideas™.