I don’t know about Apple and OpenAI. But I still keep an X account for my synthography work, and the amount content from Tesla, SpaceX, etc that’s being pushed into my stream is wild. Needless to say I don’t follow any of those accounts and I never searched for them.
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I only have a work account for X and yeah that's been my experience too, a crap ton of Elon-related posts in the "For You".