Proof of work doesn’t work here same as it doesn’t work for email. The effort to mint a valid PoW is always going to put the legitimate user at a disadvantage, whatever the implementation is. Someone with an incentive to spam will always be able to do it faster, more efficiently than you.

You can’t submit a PR because your laptop is too slow? Rent some hash rate from someone, and now you’ve just made a system of paying botnet owners to be able to make a typo fix on a github repo. HashCash was never used in the real world for a reason, it sounds cute but the incentives are so insane as to only work in a vacuum where you assume everyone isn’t cheating.

Anubis is actually not a cat. The original Egyptian deity is a god of death, and has a canine head. Anime catgirls and dog girls can look similar at first glance.