I was at a talk at a Math Conference where the speaker wasn't allowed to give the talk due to it being Classified. This speaker was able to register at the Math Conference with the talk and canceled it at the last minute during the presentation. I don't believe that that person had any issues after the talk and was not fired from their position as a researcher.

From what I can read about this the case is similar but in both actions it was a miscommunication. The speakers should have been informed that it was unacceptable. They should have been talked to about their instability to give the talk and the talk should have been cancelled. I would like to hear the other side of the story from Salesforce to give a full judgement but, I would expect a reprimand at best and not a firing.