> For usability reasons Anubus only requires that you to go trough a the proof of work flow only once in a given period. (I think the default is once per week.) That's just very little work.

If you keep cookies. I do not want to keep cookies for otherwise "stateless" sites. I have maybe a dozen sites whitelisted, every other site loses cookies when I close the tab.

A bigger problem is that you should not have to enable javascript for otherwise static sites. If you enable JS, cookies are a relatively minor issue compared to all the other ways the website can keep state about you.

Well, that's not a problem when scraping. Most scraping libraries have ways to retain cookies.