Does moving a readied unit with an effect like Charm or Ride the Wind cause the unit to become exhausted?

Ruling: Only the Standard Move has an implicit exhaust cost. When card effects move units (like Charm or Ride the Wind), they only do what they say and do not exhaust the unit unless explicitly stated.

Nuances:

• "Standard Move" is a proper noun and is not equivalent to "generally moving"
• All units have an implicit ability "exhaust: move me to or from your base" which is the Standard Move
• If you aren't using that Standard Move ability to move a unit, you just do what the card ability says
• Ride the Wind includes "and then Ready it" to provide additional benefit (e.g., moving an already-exhausted unit and then readying it, or readying a unit that was already ready to enable additional moves)
• Card effects that move units work regardless of the unit's exhaust state