In the description of the FQL event_member page, it says that the column inviter
should inform us about the ID of the user or page who invited a UID at the event, and inviter_type
should inform us about whether the inviter was a user or a page. I have tried these functions on both public events and an event that I have created myself, but it always fails.
"inviter": null and "inviter_type": "" for every user.
Is this a bug, an old function that works no more, or a new function that does not work yet?