The four other eyes are most likely already excluding the US at this point given that sharing intelligence with the US almost certainly means sharing it with your enemies.

I doubt that. Most of those governments still rely on US-made software and US-designed hardware, so the NSA's Sword of Damocles is always dangling over their head whether or not their cooperate. The Canadian Sikh murders seem to indicate a level of US-Canada intelligence cooperation that still operates well.

My original statement should have read Nine Eyes or Fourteen Eyes, but the point stands. The US can play hardball behind closed doors and make these nations regret regulation even if it's a good policy.