Greetings to you, prompt, whether to keep the client must open 24/7 for staking, or can sometimes be open?
Have to keep the client runnint 24/7 you do not. a discussion going on to change this
There is, and create more incentive to increase the minting participation.
this might be useful too if you cant be bothered staking 24/7: https://github.com/peercoin/FindstakeJS