These big corps all follow the same principle of Zuck's.

Do first, apologize later.

In this particular case, Twitter probably has made a lot more profits than the penalty amount ($150m) by selling their user data. So they can get away with it even after paying the fine and I am pretty sure they will come up with a creative way to avoid this penalty anyway.

Tiwtter, Facebook, Google these companies make their money from ads. They are ad companies. If you want to kill them fast, use an adblocker.