There are professional gamblers out there who are making a living out of these sites. There is plenty of fish to feed the gambling network up and running to compensate that...
Check for example the stats of the most high rollers/ PrimeDice/- most of them are on green. You see their high rolls but you don't see their low rolls. I am not certain, but 90% sure that most of them play low- just spinning the rolls until they reach a certain negative streak- let's say 10 reds on 49.5% chance. Then- they start betting serious. having enough bankroll to cover the next happenings. These are only assumptions, but not far from the truth I believe.
For me- being on the safe side- play payout x2, increase 5% on win, if you are lucky enough to get 10% increase on your bankroll- stop. Cannot win much, but cannot loose much either. At the same time keep an eye for negative flukes- like 30 bets no 90+, or-10 times red or greens on 49.5%, and use those. Another hint- The most precious wins I made are actually repeating a certain low chance rolls- for example you hit 0.0x(multiply x990), while rolling something else, and you turn and bet to repeat that roll. For me is working well in about 90% of the tryouts. had a 0.00 and 30 rolls later I had the next one... but no Martingale, Fibonacci, or any other multiplying strategy...
And for all of you wanting to try your strategies in a safe environment, you can use a very unknown site -
https://xdndice.net/, which is actually pretty ok. Cannot win much there, but you can play with the free faucet for ever- it is like 50000 parts of xdn (which is nothing), and try your luck out.
And the most important hint- I don't know for strategies, but one thing for sure applies for dice gambling- Murphy's law rules "Anything that can go wrong will go wrong".