Celebrities get a lot out of these platforms without having to be paid. They get everything that us normies do (because, ultimately, celebrities are people too)

Celebrities get a lot out of these platforms without having to be paid. They get everything that us normies do (because, ultimately, celebrities are people too) PLUS they get all the promotional advantages, a direct feedback loop (which many crave, despite claims to the contrary), etc. Most celebrities didn't need to be paid to get an email address.