Kind of Sevs.
Here are the reasons behind this:
The actual only reason is that stats taken by the deck-creator himself were not taken into consideration for posting in the OPs for hopefully obvious reasons.
As such, Sevs stat-posting is more of a "Hey look what I can do with my deck. You guys should really have this tested!"
The only other deck where this came into practical consideration was upped LAM: ggabriels really awesome stats are not part of the top-post-listings either but surely triggered further testing by others ...
Then there is the skip-policy, true.
Sev submitted the deck-stats with some pretty straight skipping already; god-based and perhaps also during the course of other (lost) games upon personal judgement.
Then again, the whole skip-policy has quickly become a somewhat blurred line anyways albeit clear god-based skips (as Sevs has done them for quanta-controlling gods with Instosis) was only done for DG with the Antimatter-decks as far as I remember. If the stats had been done by somebody other than Sev, they would at least be included in the skip-stat list despite perhaps having a slight advantage from skipping "probably lost games" too.
As for number of games, the unofficial bare minimum to qualify for posting has somehow become 150 games, I guess because if somebody even started taking stats, 150 games was the number of games they felt should be submitted. There are two decks (more at the bottom of the rankings) that got entered with 142 and 122 games so that the work put in wasn't for nothing.
So what it would take for Instosis to get officially added to the list is:
150+ games, by somebody other than Sev (preferably two players), while adhering to the skip-policy in the OP