Mashable: Facebook is testing an option that allows users to send a message to CEO Mark Zuckerberg for $100.
Keen Facebook observers will recognize this as a variant on the $1 pay-to-message plan that the social network has been experimenting with for months. The company indicated at the time that it would be experimenting with other prices, so it's possible we're starting to see the fruits of that.
The "Other" inbox is Facebook's dumping ground for all messages it guesses you won't want to read urgently. It's been controversial for some time, as most users are entirely unaware of its existence — and many have been known to discover messages they really wish they'd read at the time, such as job offers.