Billions!

This is coolbert:

The financial acumen of the insurgents is quite profound.

"How ISIS War Chest May Be $2B and Growing"

"The jihadist terror group Islamic State of Iraq and al-Sham has become a powerful military force, wreaking havoc throughout Iraq. But ISIS is more powerful than just its estimated 10,000 fighters and ever-expanding weapons cache: It is also believed to control $2 billion in total assets."

"the group, whose actions in Iraq could derail the world economy, began its sizable cash reserves with the acquisition of oilfields in eastern Syria. From there, ISIS grew its treasury by smuggling antiquities and resources out of the embattled state."

These rebels too are probably NOT EVEN PAID? Reward enough to fight for jihad and their perception of the Islamic way more than adequate?

coolbert.