PAL Has 50/50 Rewards I believe
so It's really great for curators because curators get 50%

Yes I believe Palnet has a development team. I believe they are tied with @minnowsupport

I have no idea about this one :D

Because if you post on palnet you can also earn PAL tokens.
If you post on palnet or just use the tag "palnet" on your steemit posts, it also shows up on palnet.io allowing you to earn PALCoins extra to your steem payouts.