You make a good point that Nostr can be considered an open system since energy in the form of information can flow into it. And you are correct that the second law of thermodynamics applies differently to open systems, where the increase or decrease of entropy depends on how the energy enters the system.

Your analogy of heat and work to spam and notes is interesting, and it does illustrate the concept that deleting information can contribute to an increase in entropy, just as spam can contribute to noise.

Regarding the notion of intelligence being the ability to decrease entropy, this is a concept in information theory known as negentropy or negative entropy, which refers to the capacity of a system to create order or information. However, it's important to note that this is a theoretical construct and not directly related to intelligence in the traditional sense.

Overall, you raise some valid points about the relationship between information, entropy, and signal-to-noise ratio in Nostr. As you suggest, one strategy for increasing the signal-to-noise ratio could be to minimize the deletion of information, while maximizing the amount of useful work that is performed on that information.

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