I’m just trying to collect some data, also I guess this post will be useful for the rest of the forum users.
In my case, in 2018 I loss 32 times one after another using the dice system on freebitco.in
freebitco.in has an insane house edge of 5% or so
So it is no surprise that you can lose 32 bets in a row on x2 multiplier. With regular house edge of 1%, I've seen losses of 28-29 streaks but on a higher multiplier (like 40% winning chance). People report and I confirm that variance (which is responsible for longer losing streaks) is surging with odds below 37% up to a point when it becomes unmanageable (read, don't practice martingale with higher payouts)