vyb benefitted from each other greatly.
How?
Vyb benefitted from pob in terms of engagement and Community. Vyb in just short term already has almost same Community or more as that of pob(what other tribe couldn't achieve till now)
But as time goes on it vyb become a big tribe it will benefit pob Community also because it's founded through pob
Pob also benefit from vyb as far as the token issue is concern.
Vyb might through pob develop it's Community but pob purchased for vyb too would be staked and more pob would be used to buy less vyb so more pob would be staked