You are lying.. 200 times 10x draw? You are a cheat if you can earn coins that fast.. and what you're saying that you weren't able to get one SR, is NOT believable.
don't be hasty, do 10 at a time, my experience is having around 2000 coins and goin 5 or 6 ten draws and I usually get a sr or 2, don't just draw one as soon as you get 30 coins, just my opinion tho
Based on the game code it doesn't matter whether you spend 30 coins, 300 coins at once, waiting in-between lottery sessions or all-in in a row: The drop rate for a card chest is 21%. The drop rates based on the game code are 6%SR, 32%R, 62%N.