I remember somewhere reading that any creature not on it's home plane is considered an outsider [after looking up the rules, its the extraplanar subtype, not outsider, but the spell in question targets extraplanar creatures too so it was horizontal movement
What is stopping me from having a campaign taking place in the outer planes when an demon/angel (and creature native to the outer planes) from binding a PC into service (via planer binding, lesser {they'd be 3 or 4th level at that point}), since the spell says that it lures and traps a creature from another plane ?
If angles and demons can bind PMP creatures into service like PMP creature can to Outer Planes creatures, I think I may have just found the plot of my next Campaign
EDIT: target outsider or elements makes this a non-issue
2nd EDIT: from what i've seen Gate has no such clause, though plannar bindings do