I’ve beat them to a few OLs. You can only have one team in an OL, so if you enter several quickly they fill up new leagues. Shoot, I have the only team in 4 champs leagues. Back in my WIS heyday I used to run around 70 active teams at a time. Many others ran that or more.
OLs fill fast enough, there’s no reason to have a bot filling teams, especially since most aren’t competitive. WIS takes OL competitiveness very serious. It’s a reason for many decisions that I personally haven’t agreed with (champ league default, fatigue model stop gaps, etc) and even them stating concerns about my bounties upsetting competitiveness when I first asked if they cared if I ran them.
So I highly doubt their bots, besides they aren’t on every OL, I’ve been in a few missing 1 of each and even one recently without either.