Some (rather arbitrary) ENReco data.
#1 Finale was on 24.09.08 (pic 1)
#2 Finale was on 25.05.11 (pic 2)
In #1 Mumei's wave bots receded at 12:20, so I'm taking that as the snapshot because otherwise it's a pretty linear stretch.
We know for sure Mumei was botted, but this snapshot accounts for it. Kronii and Kiara did not participate.
In #2 I'm taking the latest possible snapshot that falls into a reasonably linear stretch.
I don't know what that 12:05 rise for CC is about (pic 3). It was an injection of almost 2k viewers that didn't cause other PoVs bleed by that much or at all. Checking the VoD, 12:05 was when CC was reading the final dialogue with Outlander and it was a huge RP moment for her as I understand it. There's also chat activity to back the surge up. My best guess is it was a bunch of people who were otherwise watching another PoV from their adblocked PCs tuning in on their phones or something to that vein. In any case, I'm taking 12:05 as the snapshot.
We know for sure Biboo and Mori were botted. Ame, Fauna, Mumei and Gura have graduated.
Mori: 2109 => 5874*
Kiara: N/A => 2583
Ina: 3758 => 3726 -- 99%
Ame: 4637 => N/A
Gura: 12268 => N/A
Fauna: 7774 => N/A
Mumei: 2404 => N/A
Kronii: N/A => 3933
IRyS: 2184 => 2485 -- 113%
Bae: 2117 => 1501 -- 71%
Fuwawa: 1530 => 1808 --118%
Mococo: 2067 => 1526 -- 74%
Biboo: 5386 => 8021*
Nerissa: 3463 => 5406 -- 156%
Shiori: 1742 => 2421 -- 139%
GG: 8289 => 7590 -- 92%
CC: 2123 => 3169 -- 149%
RR: 1752 => 1657 -- 95%
ERB: 3365 => 3075 -- 91%
Summing up the clean datapoints (no bots, no graduates, no those who skipped #1) we get:
32390 => 34364 -- 106%
The sum of graduated members' PoVs is 27083.
The sum of Kiara and Kronii is 6206. Now we're getting into second order effects. There's essentially a few cohorts of viewers here:
1. SNOW viewers that left the box,
2. SNOW viewers that did not leave the box and diffused over all the PoVs,
3. People who discovered Hololive since #1,
4. People who left the box other than SNOW viewers.
We must assume, some part of Kiara and Kronii's viewers were watching #1 diffused across the box. Some part of that 6206 is ex-SNOW viewers. Etc, etc, but the further we go, the less the absolute numbers we're talking about are.
Another thing is the King Engine which seems to be absolutely impossible to account for. Like, only a madman would try to compare pic 4 and pic 5 and hope to draw any conclusions (although, notice chat speed).