Honestly I thought it was a fake story because of how they presented themselves while doing in on a very niche fediverse platform like Lemmy where practically only people end up who are very interested in technology, politics, freedom, etc. All topics which require quite a degree of abstract thinking and knowledge.
So even if this IQ number were correct, which I have a hard time to believe because if how eloquent they use language and how analytic they see their life, it probably has no base in reality but was a test fluke.
Just FYI; Twitter and Reddit had API usage available free of charge for more than a decade too.