semuxpool_com and semuxpool_com2 pools are back up and running! Fees are now down to 5% for a few weeks. Let's get them back running. Just 0.1SEM min payout, so all votes welcome.
sorry for any inconvenience! Was on vaca and had power loss. Moved payout script to better hosting.
How much coins min is needed for staking?
There really is no minimum. Well, to place a vote, you pay .005 SEM to vote or unvote. So, you could have less then a $.01 worth. Of course you will not make any money if you're only voting with a penny.

Also, your profit depends on the pool you're voting on.
The list at
pool.7u.org is a sorted list with the currently most profitable pool at the top which is updated at every block (30 seconds).
So, voting on the pool at the top of the list will currently earn you the most SEM daily.