...why would you sell out of stock to help take out someone else? Player 1 just lost half his moeny on taht buy, which then someone else spent. Overall the price of the stock hasn't changed, it's just been shared between 2 people. That does not make it any easier or harder for you to get bought out, because players 2 could just have easily have saved up to buy the next stock. Being ganged up on would go just as fast or just as slow whether they sold out of you or not, because for the strength of the alliance as a whole the amount of money they spent between them for that stock does not change.
Unless I'm missing something here, it seems like there is no logical reason to sell stock to be able to give it to someone else, especialyl when that piece of stock prepresents 10% of the dividends. Any specific examples to show when this is a good move?