West Coast
As I understand it, the Taliban are declining the offer of 'volunteers' for a very practical reason.
As they go to war, the last thing they need is thousands of wet behind the ears teenagers who can't even fend for themselves, let alone live and fight in the field.
When their LOCs are being bombed back into the stone age (if they weren't there already) and General Winter is on the horizon; acquirng thousands of militarily useless, pubescent zealots to resupply is the last thing their logisticians will need.