you know that a company putting a thing in their terms of service doesn't make it legally binding, right?
And you know that doesn't necessarily imply the reverse? Granting a site a license to use the stuff you post there is a pretty basic and reasonable thing to agree to in exchange for them letting you post stuff there in the first place.
hence why they all suddenly felt the need to update their terms of services
As others have been pointing out to you in this thread, that also is not a sign that the previous ToS didn't cover this. They're just being clearer about what they can do.
Go ahead and refrain from using their services if you don't agree to the terms under which they're offering those services. Nobody's forcing you.