They did, as Chris himself then points out in the next tweet. It was however cased in that fluffy language that those communications always are.
> Terms of Service: We reorganized our Terms of Service to make them easier to read. Some changes include: new provisions regarding the recording of events, modifications to the arbitration provision, additional rules governing refunds, and incorporation of a Data Processing Addendum for Organizers.
I'm glad to see that update - while describing the addition of a provision as a "reorganization" seems... deceptive, to say the least, it's still better than no notification whatsoever.
> Terms of Service: We reorganized our Terms of Service to make them easier to read. Some changes include: new provisions regarding the recording of events, modifications to the arbitration provision, additional rules governing refunds, and incorporation of a Data Processing Addendum for Organizers.