LiberNode＝masternode?

Yes, but with some differences.
1) Deposit is not required.
2) It takes 25% from Miner's rewards

how can ?
so, everyone who run libernode in their wallet will receive rewards from this ?
just like that Huh

Yep. We're thinking now about chances.

So that means you need no masternode collateral like any other masternode coin? Basically, anyone can start dozens/hundreds of MNs?