Usually, just one of them going down causes significant outages, but many major sites have been thrown into disarray with multiple services having issues. We’ve got no word yet as to what the issue with these CDNs is. However, many games run their servers directly from CDNs, so when they’re down, the game is down.
This means that users might find some sites are running slower than usual but still load. With AWS, Cloudflare, and Akamai servers down, much of the internet has to fall back to local hosts.