That's not necessarily true, there are positively reinforcing relationships and negative ones too. So, some strategies, everyone does them and the result become

That's not necessarily true, there are positively reinforcing relationships and negative ones too. So, some strategies, everyone does them and the result becomes less predictable, others, everyone does them and the result becomes more predictable. A common modern example of a positive reinforcement is people pumping meme stocks. There are strategies that the more people know about it the stronger it becomes.