Edit: And Live Stats can be seen at https://bitminter.com/livestats/big for everyone to confirm the hashrate.
What's the PPLNS reward per share? I had a look at the site but couldn't find that info.
PPLNS doesn't use a specific reward per share, you receive a % of the block reward based on your submitted share # during a time period (shift) vs total # submitted to the pool.
For 24/7 mining, the reward scheme is irrelevant (some have more variance in payouts than others, not really relevant for 24/7).
I'd say what is really relevant, roughly by order of importance: (1) pool uptime, (2) pool connection reliability+low ping, (3) pool fee+merged mining opportunity and (4) pool block tx fees sharing.