I have tested with more 7 people during last 3 days:
CoinPot.co multiplier behaviour seems to be scam.
i.e.: there is more than 30% multiplier rolls resulting in token lost, so getting challenges you never get profit.
Tested with 2x multiplier (50% chance of win/lost) and always high (2) / always low (2) / alternate (3).
Here is a sample of alternate test:
So be very careful if you play multiplier these november days because it seems like the admin cheat it to never profit for the user.
We have requested a paper to FTC (anti-scam autorities). In some weeks we will post updates.
UPDATE: CoinPot.co site is blocked in several countries... but reverted... I cannot understand...