Why would it fail to slow spam, for example on nostr, if relays required some POW for messages? Would the threshold need to be so low as to allow mobile devices to successfully post and then spammers would pretend to be mobile devices (or not even need to pretend because of the low threshold)?
Discussion
well, i give up
i'll just laugh at you when you try it and get surprised that it doesn't work
Why not explain with some examples from your experiences? I looked up bitmessage but didn't find much about the spam other than some reddit post asking if the spam wars were over. It sounds like POW alone is not sufficient to counter spam and so you are saying POW is not the answer. Is that it?