I could go into a much longer diatribe on interactive services at scale but that would take even _more_ words. If you’ve been in the MMO space for long you should know that EVE Online hosts 120,000+ concurrent users in a single-sharded service. Not “total subscribed accounts” or “active” over some broadly defined period of time. Concurrent. You can find some reader-friendly articles explaining the basics of the (10 year old) tech online.

“People” “confirmed” it by which you mean someone in the forum posted, without context, a map based on Arbor Networks data that showed pretty lines entering and leaving the US? Botnet activity is background noise. The botnets any random guy with a tor browser can hire for $10 are well-handled by commercial anti-DDoS solutions. If you want to lose sleep at night, think about what a DNS amplification attack against real critical services would do. But no one is investing that much in hitting MMOs. There are minor-scale DDoS attacks against games now and then when there’s a profit motive, like being able to dupe items in a P2W economy. But DDoSing games “for the lulz” is pretty much a dead art. Turns out when people from Lizard Squad and LulzSec started going to federal prison with decade-long sentences, people backed off of casually DDoSing games just because they could.