One question regarding the 6% staking reward every year.
Do I need to run the Emercoin client 24 hours a day or do I receive this if I just log in every 2 weeks or so?
Many thanks!
You can get results by running the client every 30 days, and waiting until all your coins stake (may take a few days). But after a few months of doing this, the coin maturity begin to spread out and you need to leave the client on for longer and longer, until it makes more sense that you just run it 24/7. That's because staking can split the coins, meaning that next month you'll need to stake twice the number of times.
So you could set a reminder to unlock the wallet for 1 week of every month.. that should work ok for a while. But by running full-time node you assure yourself that it will stake at every opportunity. After all, part of the intention of PoS is to incentivize people to run full nodes and support the network. This is what I've found anyway.