From what I see you weren't actually chasing a 2x multiplier and instead using dicebot to go for alterning multipliers each bet. Regardless you've seemed to have stopped at a streak where you got aproximately 16 reds in a row, if the payout would've been 2 X ( it wasn't ). A streak of 16 reds in a row on 2x multiplier theoretically over a large quantum of bets happens once in 65536 bets. Considering you've stated you placed 4 million bets, this 16 streak of reds would've happened roughly about 61 times, so over a large span of bets it's actually not that rare.
There's a tendency for gamblers to cry "Scam" whenever they come across a long streak of losses, while discarding long streaks of winning bets
Actually I am going with there is a tendency for SCAMMERS to cry "Scam" about other peoples things when they can. Makes them look more legit.
Look at the OP just screaming scam against some casinos (yes the 1x is a scam we all know that) all while attempting to push his magical pumping service.
But, yes you are also c100% orrect in the fact that gamblers do tend to scream scam when they loose.
-Dave