Tip for claw machines: Monitor win rate.
Once upon a time, there was a special spot in the D field of Macau where people would go to pick up lucky ones who were constantly losing and eventually gave up their money. They then followed suit, winning quickly. In the case of the slot machines as well, their claws' hit rate is basically fixed. You just have to stay behind someone and watch them fail (they're not able to catch anything). If they give up, you can follow them. Usually after several tries, you'll succeed. If the machine hasn't been touched for a long time, don't try it. The method is simple - be bold and stand behind someone. At the same time, keep an eye on multiple machines, and use your phone's note-taking function to record how many times each machine has failed. After observing for a while, you should be able to work out what their hit rates are. If someone wins, it's best to avoid that machine for a short period of time. Last week, I won 11 out of 50 times by using a pushcart to pull the slots.
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