Yeah, I think this practice originated at Amazon not long after Edward Tufte's article “The Cognitive Style of PowerPoint” was published. I think I heard that Bezos read that article and was influenced by it.
Probably true. The reason I was introduced to Tufte is when he was invited to give a talk at an Amazon Fishbowl (informal, internal lecture/music series). This had a strong stamp of Jeff-approval. I don't think that this particular practice was adopted immediately but Bezos plays a long game and this was probably an opening move.