Telepathy

technically not breaking the rules is very much a fey thing, so id say yes. they are technically not breaking the contract.

Quote from C3ii >>

I would think the creature needs to be known to the telepathic monster, but if that were the case why would they specify not needing to see the contact without establishing another way of knowing the creature's existence. 

 Think of a leader that has Telepathy, but its minions do NOT have Telepapthy.  Even if the minions are in a nearby bunker, the leader could rouse them with telepathy and direct their actions without needing line-of-sight to them.

Thri-kreen Telepathy

Without the assistance of magic, you can’t speak the non-thri-kreen languages you know. Instead you use telepathy to convey your thoughts. You have the magical ability to transmit your thoughts mentally to willing creatures within 120 feet of yourself. A contacted creature doesn’t need to share a language with you to understand your thoughts, but it must be able to understand at least one language. Your telepathic link to a creature is broken if you and the creature move more than 120 feet apart, if either of you is incapacitated, or if either of you mentally breaks the contact (no action required).