Political campaigns? A political candidate may want to know his opponent's supporters and may think he can do a more targeted wooing. 1 may say it's advertising too.
Also, he can send bots to the political discussions that folks participate in. The bots can start nasty political arguments.
A greedy religious figure may want to encourage more to join his religion. More members, more cash.
In my country, from what I observed, not many study tables and work tables with power outlets. 1 may say, "Add usb-c sockets too." But the future is hard to predict. Will there be usb-d? Will 150-watt charging be the norm for phones? The safe thing to do is just outlets. Power bricks for phones are cheap anyway.