Min said minimum withdrawal is 2000000
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Discussion
Hope this helps show it is possible to cahs out 
I'm trying without paying... Just with 2 contracts
Thats what i did and just now i pulled out 234 sats overall from the app ive gotten 600 just watching ads once in a while. It is a bit slow but if you use my reference youll get a 10% extra profit
Basically all the 0s you see after the 20 is useless the 20 counts has 20 100millionth of a btc meaning 20 sats so minimal withdrawal is 20 sats hope it helps. And like he said just wa5ch ads here and there don't expect to make stocks for free but there is a good outcome of sats overall from one app