Most likely this is a secret, but still Ill ask. Are there any setups for automatic dice to stay in a small minus, but wind up the volume for the competition? But most likely whoever uses this just will not tell me

No, there's no secret. It's called a strategy which they come up at the very last minute of the contest.
It's about the bankroll that you have and most that has bigger bankrolls has higher chance of winning not just gambing alone but also in the contest.
These are usually, trade secrets that not many would tell you about and if they do then don't instantly believe them as they might have said something just to confuse you. These strategies aren't usually shared as it takes time and money to devise them and I'd be surprised if someone was to share theirs
You are absolutely right and that is why I never pay attention to any tips and examples of strategies, not only in gambling, but also in trading. Im just starting to understand gambling and have already realized one thing, that the main thing is to effectively use the capabilities of faucet, which provides a resource to get the first balance and understand how dice work. Everything else is, first of all, luck, because I do not see another factor of influence on the result.