Data scraping.

If anything else, the AI machine wants near constant streams of new data, even if it already checked with you 30ms ago.

A CDN helps immensely.

Also keeps you from getting DDoS'd if you did something like run it off your home connection.

Your webserver most likely have "rate limiting" built in already, which you can configure to act based on lots of variables typically. Set a limit of 1 req/s or whatever, and you've stopped 99% of all DDoS you'll encounter on the public web. If your visitors get cranky, up it to 10 req/s and you still are preventing most of the "abusive traffic", granted your backend/website isn't completely upside down when it comes to performance and resource usage.

CDN is something you do once you run out of options, not something you should reach for immediately, it makes no sense in most cases of just hosting a website.