My deduction is that an honest, earnest recommendation (good, free, not engagement bait) is infectious. We're so flooded with people-shaped husks cosplaying interests (for various ends) that it's refreshing for someone to take a thing that has made home in them, carve out a piece, & invite you in.
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If there's a pure, ideal version of the internet, it looks something like this to me--creation, recreation, a constant shuttling of magic.