So u play the red area? I always play the safest color and still end up with nothing, no matter how much money I would have it is just a waste of time and money for me, all I do at every casino is loose 
I too fee in this game we can't win much and I tried many times and what I notice is ball moves to lowest possible position which ever color you pick. This just my observation and I didn't go check any details because I didn't play there with money. Congratulations to winner and you should be very lucky that day.
You don't have to play with money you can test drops
Set your amount to -0 drops to w.e you feel an you can test the line.
The reason it seems harder to hit the ends is because it is harder
The odds to hit at each position, from the center outwards are
1:5.092, 1:5.729, 1:8.184, 1:15.004, 1:36.009, 1:117.029, 1:546.133, 1:4,096, 1:65,536
The more drops you have the higher your chances of hitting. Some lines have been set up to win more often that users have found like this.
https://bitvest.io/?custom=0,0,0,0,0,1.06,1.05,1.1,1.05,1.07,1.05,1.06,0,0,0,0,0
Or its sister line
https://bitvest.io/?custom=6,0,0,0,0,1.05,1.05,1.1,1.05,1.07,1.05,1.06,0,0,0,0,6
You can always test a line a few times to see how well it dose.
Teal line is the favorite because even if you lose you at least get back 40% of what you lose.
I normally combo and that line above and teal.
I have tried many times but my feel is we always lose in this game. It doesn't matter which ever color we choose. I tried many times with the free money this site offers to pass my free time but I never hit single time any bigger odds. I feel your theory play more to win big may be not correct.
That's the thing you don't have to play big to win big i just hit 400k from faucet like 20-30 mins ago just fine.
An this is faucet funds/rainbot funds this happens a few times a day also.