They don't want much
I have no problem with unpaid leave, it may be perfect for some people and if it works for them great!
However what I find strange is that if you go for more than 90 days you loose all your entitlements .
Surely if they are looking for volunteers and someone wants 6 months off, why penalize them for helping out ?
Again it's all very one sided, I don't see a large uptake of the offer anytime soon Especially when some people cannot get the paid leave they want