None strategy will work if we use it for a longer time. In gambling there are a bunch of variables that will determine our result. Luck, self control and money management are the three main variables. In this kind of game, I already met some people that got lucky but failed to control their self and ended with bad result.
Mathematically we do not have any proof why one strategy stops working after some times. But I also have observed a few of my well performing strategies suddenly giving me losses.
I agree, there are a lot of factors which are deciding our results in gambling, I'm sure I'm not changing anything of those factors still my strategies are not working as before.
Honestly, I could not make any conclusion other than I am also not able to make any consistent profits from dice gambling.