Masternodes - fully synchronized wallets that are connected to the network 24/7. Their function is to serve the network - from conducting transactions to additional services, such as providing complete anonymity of transactions (transactions are NOT recorded in a block system, for example, in Dash), etc. depending on the technology of individual master codes. Since the masterwindows are in fact partially performing the work of the transaction processing miners, they take a part of the found coins in the new block to themselves, thus dividing the profits with the miners.
As a rule, in order to become a masternode you need:
1) Completely be synchronized with the network of blocking.
2) Your wallet matched certain parameters. For example, included 24/7, there was a powerful computer and other technical issues.
3) Have on the purse a certain number of coins.

use english

Another one important feature of masternodes - mixing coins and create fully anonymous transactions.

Doing a fork like that is not something to take lightly

...and any plans for other exchanges? like coinexchange?

Yes, PoS in its most normal and basic form could be implemented in no-time. But that basic PoS isn't any better than PoW. The PoS we plan the implement isn't any basic form of PoS and plans to `fix` many of the problems that this basic PoS has. We think it's better to have no PoS for a while than a PoS that's possible broken.

There is any news regarding POS for shield...would be a great plus for stakers!

You can do something similar to Smart Rewards???
Long term holders are key to the project’s success!!! process description https://smartcash.cc/what-are-smartrewards/

Of course not!