They didn't reject adding SpaceX, they simply said they would not change the rules to add it early, like the other indexes are. Those rules include a minimum time listed as a public company, a certain percentage of shares being floated to the public, and some profitability. I doubt SpaceX ever gets there.
Some of those other AI companies might make it through the gauntlet, though, and be listed eventually.
In German, wouldn't that all be one word?