I believe Blizzard has forgot to update OCE ladder cutoffs after the ban waves.
Pulling data directly from Blizzard API, earlier this week Blizzard updated US and EU ladders. The update showed that Blizzard disqualified teams with banned players in them. The cutoffs were lowered to reflect the disqualifed teams.
OCE data has not changed. According to data directly from Blizzard API, and the cut offs in game at the arena master, the cut offs are still set to teams that are banned. This currently means no teams on OCE will be getting a rank 1 title.
Basically, people that broke ToS are now holding all the R1 titles, and they won’t be awarded them. It means 0% of legitimate players get rank 1 titles. It also means way less than 0.5% of players are getting a gladiator title.
I’m not sure if Blizzard has overlooked this. However, I do know that USA and EU have had the changes made, and OCE cutoffs have stayed exactly where they are, despite banned players.