How does Al-Qaida use the internet to further its cause or survive amidst robust counterterrorism strategies?

Central Question

How can we best tackle the phenomena of terrorism?
Sub Questions How would a realistic counterterrorism theory impact terrorist organizations like Al-Qaida? How does Al-Qaida use the internet to further its cause or survive amidst robust counterterrorism strategies? How effective have the current counterterrorism strategies been in curbing terrorism?