Given the nature of the scam, I think it's a lot of money.

The multisig pool address has 12.7 BTC in it, somewhere around 350k USD, judging by how much they spend on their review campaign, the other campaign, the leftover in escrow, the website, the code, the design, and all that, it makes me doubt that they would settle with just 350k, also, it's almost sure that the 350k sure includes some of their own funds.

So this was a lot of money, time, and effort invested, 100k profit or so won't cut it, my guess is somewhere around the 9th of this month the mixer hit the jackpot, a large deposit came in, and that's what triggered the code/person into excusing the exit scam, notice that, the multisig address doesn't necessarily receive all the deposits, you get a different deposit address and what happens next is up to them.

We may find out eventually if a large deposit was made, someone will come here and tell the story, also to anyone that might say "Oh it was obvious, I suspected it" I'd call b.s on that, it was a "masterpiece", the guy/guys behind it were pretty intelligent, far more sophisticated than the average "send me your 1 BTC and get 2 BTC tomorrow".

The crypto space is crazy, and even more, reasons to NEVER trust anyone or anything regardless of how legit things look, but 'risk' is part of this ecosystem, we could only hope that this serves as yet another lesson to every one of us.