Hey Zeio! I think you misread the chart. The 8 results shown in the twitter chart you posted aren't each player's top 8 results but only show these players' results from the last 8 events. If you notice, the results in the chart only include those from the China Open and onwards, but don't include the Qatar Open and the WTTC 2019. The cells highlighted in Green are those results good enough to form the top 8 results of the player while those highlighted in gray have already been eliminated from the player's top 8 results. In fact, Ito, Ishikawa and Hirano all have 900 points as their worst Top 8 Result. Please see the spreadsheet below containing all events:
View attachment 19681View attachment 19682
Basically, for Ito, Hirano or Ishikawa to get any kind of gain in WR points towards the Jan. 2020 ranking, they need at least a SF finish in a World Tour Regular event and at least a QF finish in a World Tour Platinum event since their lowest result among the top 8 is 900. In fact, Ito will have the hardest time gaining ranking points as compared to Hirano and Ishikawa because Ito only has 2x 900pts while both Ishikawa and Hirano have 3x 900pts.