Being added to the index is literally the only thing causing "the squeeze" according to this description though so how does that benefit either the author or the index holder?
If the stock was added to the index at a normal period then all the shares would be available.
The author wants to buy ahead of the indexes and benefit from the squeeze; he wants the normal rules of waiting a year before SpaceX is eligible to join the indexes to apply.
It's substack, not ycombinator. The article is obviously not targeted at ycombinator.
And I don't think he's doing a pump and dump. He's just doing the very human act about ranting about things that affect him. His self-interest colors the piece.