However, I see something interesting in their approach: using the same number. I too whenever I make some sorts of predictions (except sports betting or other bettings where logic can be applied) hold on to one rule: the less there are variables in the system - the more likely is the win. So, I keep using the same number, or add the same numbers to a certain parameter, or use the same formula, this way I bring more stability to the system, by making only one parameter a variable (my predictions strategy) and leaving the second one (the way things will happen) to chances. But it's only a theory though, I can't say for sure if it actually works
