No its not... Nuls was given to all people who have taken part in the inchain ICO on a 1:1 basis with the option to get payed out...
most participants decided to get NULS tokens... also every one has the option to be a node with a staking base investment which will be voted on by community... ie. you want to be a staking node you need a "base stake" of 200 000 Nuls.. you could also
get chosen by others to stake with their coins... so as an example i have 20 000 NULS if i find 9 people with 20 000 and they chose me as a NODE they "lock" their stakes on my NODE together we have 200 000 that get locked and all the stake/earnings will be devided betwen each member of the node who chose to participate in the staking process on my NODE...

In my opinion it is quiet a good system because not every one can be a NODE the Network is still decentralised and also through the
voting/staking process on the most reliable nodes the participants are rewarded to keep their nodes in good shape connection and uptime wise...

My explanation of staking might not be the simplest but if you look up the Whitpaper you will find the explanation...also im sure we will son se a better or more exact one in the yellow paper...