ISIS faces increasing military pressure from Iraqi government troops and Iranian-backed militias, it may be feeling rising financial pressure from a shaky financial model based on terror.
The militant Islamist group has taken over swathes of Iraq and Syria, proclaiming a "caliphate" - an Islamic state ruled by one leader. To help its turbulent and bloody rise it has built up various and illicit sources of revenue.
From the selling "poor-quality oil" stolen from captured fields and refineries and "donations" from wealthy benefactors in the Gulf, to smuggling, stolen harvests and selling cultural antiquities on the black market, ISIS' economy is far from standardized.
The militant Islamist group has taken over swathes of Iraq and Syria, proclaiming a "caliphate" - an Islamic state ruled by one leader. To help its turbulent and bloody rise it has built up various and illicit sources of revenue.
From the selling "poor-quality oil" stolen from captured fields and refineries and "donations" from wealthy benefactors in the Gulf, to smuggling, stolen harvests and selling cultural antiquities on the black market, ISIS' economy is far from standardized.