A flat and wide rate smooths out the dispersion wave. The credit descent is smoother, the waves of decline and rise go around this axis. Quite often, a situation of a local small plus for the entry point into the game arises.
1) Replace the 16K step with $16, what's the point of fantasizing about hundreds of thousands? The general math won't change.
2) Three-stage WWW is executed on average (16/37)^3 = 0.08064 = 8% of cases and brings +$112. Total for every 100 spins: +$896.
In the remaining 92-8*2 = 76 cases out of 100 you have a loss of -$16. It turns out 76*(-16) = -$1216.
Total for every 100 spins: -$320.
The moment with (-8*2) is not exact, but unfortunately mathematicians have left our forum and now we have to rely on common sense and logical conclusions.
3) To double a similar deposit of $300, you need to get a small WWW advantage during the session:
+300 = +112 +112 +112
4) In your case, such an advantage is achieved:
a) really hot numbers of that global period on that roulette.
b) virtuality of bets.
It is quite possible that, as in fairy tales, on the third day it was necessary to review your list of the hottest. Also remember that real rates will be pulled into the game adaptively and the mathematics will be violated by forced throws W and L.