I've got out of the Multiply BTC bonus a few times with a 25x rollover requirement. I don't like using the low multiplier strategy for this, I'd rather just bet normally. Trying lots of low multiplier bets just reduces the probability of variance being in your favour. The higher the number of bets the closer to the expected value you get. That's the same reason bots and scripts reduce your chances. I prefer to make fewer larger bets.
I'm a bit confused with your technique, is it avoid low multiplier and make fewer larger bets?
wouldn't that
(there's a chance) make you lost big amount if got hit by bad long losing streak
so are you saying betting normally with 2x multiplier would be better?
why betting higher amount with low multiplier wouldn't work the same?
(towards 25x rollover)is it because the return too small to cover the losses?
At the end of the day it's based on luck.
I just did my 1.01x on about 50 bets and managed to lose three of them.
Meanwhile, a few days ago, I made close to 250 bets and only lost once.
I usually try to martingale at 2x starting low (around 8 sats) but even then you lose quite a bit and if you win, you only get an extra 8/34 sats (depending on the strategy).