Most people don't remember, but as part of the AOL TimeWarner merger, AOL was forced to agree to open their protocols to allow other company's to chat with AOL messenger. Most other companies refused to participate because they wanted the messenger monopoly instead.
@1dalm @mattburgess Yeah this feels like Meta is trying to get in front of something - they don't need everyone on their service if the service goes through them. They want to be "The Carrier"; Ma Bell would be proud.