It's wild to me that PoW systems are how we sort the bot problem... the bummer is that all this "work" is just wasted cycles, at least in crypto there is a token you can sell.
Well, there was CoinHive which did this exact thing 6-7 years ago, but that system got abused a bit much
PoW was originally anti-spam technology.
> at least in crypto there is a token you can sell
That would defeat the purpose. The goal is to make scraping costly, not profitable.