As opposed to Reddit? Or your Gmail? Or everything else on the internet?
The AI company is public, but he social network was private.
Source: https://forgeglobal.com/xai_ipo/
Neither are valid comparisons to xAI owning X.
Probably this is the reason why all the reddit free public APIs are gone - to block scraping.
Owners: Advance Publications (30%), Tencent (11%), Sam Altman (9%)