Scrapers are orders of magnitude faster than humans at browsing websites. If the challenge takes 1 second but a human stays on the page for 3 minutes, then it's negligible. But if the challenge takes 1 second and the scraper does ita job in 5 seconds, you already have a 20% slowdown
No, because in this case there are cookies involved. If the scraper accepts cookies then it's trivial to detect it and block it. If it doesn't, it will have to solve the challenge every single time.
