So far I have been unable to find a reliable source to verify this information. The story seems to primarily be swirling around I-hate-Obama websites, so I am unconvinced.
If it is a true story, then I suspect the more plausible reason is that they will be used in some capacity to fight terrorists. I don't know why the administration would leave it open to speculation. Perhaps they figured that relative to the billions in aid given to other countries, it wasn't even worth mentioning.
I'll leave it to the conservatives around here to postulate stories about Kenyan special forces using them to rescue Obama's Grannie from pirates.
As for whether we should pay for them, why not? 3 trillion or so already spent on the War on Terror, who will even notice. It is kind of like fretting over whether to buy an air freshener for your Porsche. The time to think about and question the War was 10 years and a few hundred thousand deaths ago.