That is literally impossible to have seen that in only a year.
24,312 episodes means 66.608 episodes a day. At 23/min an episode this is 1,531.98min/day and comes out to 25.53hr/day which is literally impossible let alone physically.
Unless you were doing something like watching at 4-8x but even then it would not leave much time for sleep, work and other life-related matters.
If you’re watching for enjoyment you’re not doing so at 4x-8x speed.
Didn’t get it either at first but I think they are referring to their total watchtime being about a year, not having started anime a year ago.
This, probably. Though it’s still a lot.
The profile page OP linked says “Since 2006”, so ~17 years.
But as you said, that’s still a lot at ~1.5 hours per day. I didn’t start too much later and am “only” at 128.8 days.
ITT: English is hard