Hmmm, I've thought about that as well since writing my above comment. You are correct in that the scenario has many similar elements to a pump and dump, in the

Hmmm, I've thought about that as well since writing my above comment. You are correct in that the scenario has many similar elements to a pump and dump, in the sense that you also had to play it smart and set your expectations realistically if you didn't want to end up losing money. Just like in a pump-and-dump, some people were always going to be bag holders with GME, namely those that misunderstood what 'short interest over 100%' meant and thought they could set their price at $42069. But I still think there was an important difference: The point at which the best move switches from cooperate to defect comes sooner in a regular PnD, because there is no 'outside money' to be gained when cooperating for long enough. So, in a PnD, you should probably sell as soon as the momentum has really picked up, whereas in this case, the momentum actually increased the chance of cooperating being a successful strategy -- up to a point that would have had to be determined.