1. I suggest u to not spend 10 coupon. Max free attempt is two and the number of refresh if i am not mistaken is unlimited but u need to wait several second (maybe 5 second) before pressing refresh *on.

When u farm ores from ur mine it will get upgraded eventually, so u can fram more. The quantity and the quality (silver , gold etc) will be upgraded too. And after that u even can unlock ur 2nd then 3rd and then 4th mine.

2. its up to you but i suggest u to not spend coupon. As F2P we must learn to be patient XD, u better use ur coupons in buying other power item.

3. when u click steal, u dont know whom u steal from . (if i am not mistaken), and u will have to pick 1 of the 3 reward after successfully steal someone ore (free 1x and the 2nd draw will cost u 10 coupons). Unfortunately the victims ores will be decrease just like convoy plunder victim but u can give him a gratitude by buying young picture of granny chiyo or even giving free coupon to him.

Btw when someone mines got plunder/stealing, the name of plunderer/culprit will be written. So the will know who steal their ores. So its ur choice.

4. Its not worth for F2P. Its too expensive as hell. Just be patient. Just use ur free draw everyday.