Which two methods have terrorist groups used to diversify their revenue stream and to fund...

Art and Antiquities: Conduits for Money Laundering and Terrorist Financing

Why Fight the Antiquities Trade?

More recently, groups like Daesh (Islamic State [IS]), al-Qaida, the Taliban and their affiliates have been engaged in ****cultural racketeering and terrorism in Iraq, Syria, Yemen, Afghanistan and elsewhere, converting patrimony into cash for weapons and troops****.

https://www.un.org/press/en/2015/sgsm17427.doc.htm

As Terrorists Diversify Fundraising Tactics, Greater Efforts Needed to Shut Down Illicit Channels, Secretary-General Tells Finance Ministers’ Meeting

Terrorists continue to adapt their tactics and diversify their funding sources. Today, Da’esh runs a multi-million-dollar economy in territories under its control. Da’esh terrorists raise money through the oil trade, extortion, undetected cash couriers, kidnapping for ransom, trafficking of humans and arms and racketeering. They loot and sell precious cultural property, shamelessly profiting from the destruction of humanity’s common heritage.