Nemo_bis 🌈@lxo It is sad, but we have had captchas forever. The skills to solve captchas are unevenly distributed. A PoW captcha only asks you to spend some electricity, which is a commodity more evenly distributed (among those who already have a browser and are using it for compute-intensive purposes like video). I have not measured how much additional electricity is consumed by visiting this sort of captcha, but I expect it is negligible compare to the playing of the video.
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