If you can find S9 at 1000 usd, you might be able to ROI....  (my best guess is 10 months considering your earning decrease by only 5% a month). Above that price, better buy BTC directly. And your earning always decrease more than 5% per month.....    and this doesnt count new game changer miner out yet.

Again, buying BTC now and hodl is a much better choice than start mining at current situation (new delivered S9 13.5+psu (March batch) is being sold in my country on trade website for less than 2200 usd already). Those miners with already ROI S9 can stay profitable until price drop to 3000 region. Below 3000 usd/BTC, continue mining is just plain fun hobby. It becomes an expensive hobby. Even you have solar farm, I dont think it will worth the maintenance cost of the farm.

Ordered yesterday at 0610 gmt, paid at 0614...
Still unpaid & expired...

Keep on waiting...

S9 will be in the market for a long time. If you are Bitmain, why would you want to release any new product when existing product still hit a 3 month ROI... 

Let alone the limitation of silicon chip being reached. Efficiency comes with size reduction...   you cant expect wafer fab to have fast development as the past 20 yrs anymore. We are reaching the limit already.

My reward exceeded the threshold since yesterday. An hour ago, all reward s gone from the dashboard but nothing appear in the payout tab.

Slow payment confirmation doesn’t bother me, but nothing appears on payout tab never happened before.