I'm sorry, you didn't say anything about your reasoning behind your ad hominem attack, so I can't properly evaluate your point. I eagerly await your clarification as to the relevance of your observation with regards to this HN topic.

If the reason for leaving X is a 97% drop in impressions, explain moving to Bluesky and Mastodon where you'll get even less. The numbers argument is a fig leaf. This is an ideological decision dressed up as strategy, and that's fine -- just say that instead of pretending it's about data. As for "ad hominem" -- pointing out that the person making the decision has an advocacy background, not a growth background, isn't an attack. I am providing context for why a "data-driven" post reads like a manifesto.

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They probably get more engagement at those platforms. Quality is often more important than quantity when it comes to impressions.