> 5.2 Suspension and Termination. Your rights under the Agreement will automatically terminate without notice if you fail to comply with its terms. We may terminate the Agreement or restrict, suspend, or terminate your use of the Services at our discretion without notice at any time, including if we determine that your use violates the Agreement, is improper, substantially exceeds or differs from normal use by other users, or otherwise involves fraud or misuse of the Services or harms our interests or those of another user of the Services. If your Service Plan is restricted, suspended, or terminated, you may be unable to access Your Files and you will not receive any refund of fees or any other compensation.
But did they ever kick anyone off? They didn't kick off people using hundreds of terabytes or more. And abuse language is there on every ToS. I'd say it truly was unlimited while they were selling it.