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Big part of the internet is going through Cloudflare these days, so it tracks you as you browse, and does something clever to figure out if you're a robot. Google can do the same, they'll have a cookie on you. If they're not sure they'll show you one of those challenges.
That's what I don't get, their stock goes down for a while but then people think it's a good time to buy and it goes back up. Like it doesn't affect them at all. Casually kill 400 people and barely anything happens.