Yes, this is pretty huge amount to wager just in a couple of days actually so may be around 3 days or something he already got that amount and I know this will be no chance for me like low player to wager that huge amount. But to have 0.1 btc wager with 0.001 and 1.01x multiplier, I think you will lose fast, you need to wager 100 times to cover your initial bet mean while it is better if you use 1.1x multiplier. But all of this is not a guarantee you can achieve that. But basically when I have 0.1 btc with 0.001 btc, the wagered amount will be around 4x-5x. Never hit more than that ever, but may be you can try it
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.