When links are dead due to the web page owners returning 451 errors, this bot considers the page to be alive. Instead it should have a server in the EU so it can detect 451 dead web pages and replace the dead 451 links with worldwide accessible IA links.
Here is a list of websites dead in the EU:
All references to the above web pages are link rotten in the EU, but the bot doesn't catch it yet. That should be fixed.