When you take control of a unit with Deflect using Hostile Takeover, do you still have to pay the Deflect cost when targeting it with your own abilities (like Deathgrip)?

Ruling: No, you do not have to pay the Deflect cost. Once you take control of a unit with Deflect, it becomes your friendly unit, and Deflect only applies to enemy abilities.

Nuances:

• The term "Opponents" in the context of Deflect refers to opponents of the controller, not the owner of the card
• When you control a unit, you are not your own opponent/enemy, so your abilities targeting it are not "enemy abilities"