When I am playing a game with coin tokens, during buy phase, if I slide the coin token slider to "0 tokens" and click "0 tokens" button, my buy phase immediately ends. I am not sure why this happens, since it does not happen with, e.g.,"1 token" situation. In that case, I simply spend 1 token and my coins increase by 1.
Why do I click "0 tokens"? Out of habit, I guess