This may be an axe you want to grind, but it doesn't seem pertinent to the actual statement from Sourcehut. They don't say they're terminating crypto projects because of the environmental aspect. They're terminating them because they're often fraudulent. According to this statement you could be bad for the environment, but not be a platform for fraud, and appeal to Sourcehut and be reinstated.

I personally am a fan of Drew's work and pretty skeptical of crypto, but this announcement makes me feel that Sourcehut is too small and attached to the preferences of one man for me to host anything significant there.