Comment by verteu
> PoW increases the cost for the bots which is great. Trivial to implement, sure, but that added cost will add up quickly.
No, the article estimates it would cost less than a single penny to scrape all pages of 1,000,000 distinct Anubis-guarded websites for an entire month.
Once you've built the system that lets you do that, maybe. You still have to do that, though, so it's still raising the cost floor.