Sorry, but I wasn't. I thought that was clear from "can't afford the cost of keeping up-to-date with the Google IP list".
> They should have a great interest at blocking archive.is
Agreed, and many should have a budget to suit. So I conclude archive.is has put a lot of effort and cost into its defence. And all for free to us, the users.
Are you doing regular patching? Automated restarts? Watching for security breaches? Or just praying it stays up forever?
Otherwise, respectfully, I would not classify you as a "serious operator." Your site could live or die, and it would be all the same to you. Or, you've handed it to a third party for management and they don't offer much in the way of resilience or stability.