What the disciples have earned is already a lot, but there is also the amount earned by the three elders of the Blood Skull sect.
Arthur doesn't know how much they earned, but he can guess that, just like the case with the disciples, what they got came at the expense of the other sects.
He dares to say that even though the people of the Blood Skull sect only account for 14.3% of the people who entered the secret realm to harvest, what the people from the Blood Skull sect earned should account for 70% of the total output of the secret realm.
He can imagine how absurd such a proportion is, but he believes it.
The secret realm has been at peace for 90 years and allowed to rest and grow for that long. Then the Blood Skull sect came and took resources that were worth 5 times their proportion of people.
