Another extra 20 credits/min for 1 hour if you connect when the server has 0-15 players AND there are 22 or more players on the server.
It means every minute the server checks if there are 22 or more players on the server. If you connected when the server had 0-15 players, then you get +20 extra credits per minute, for the next hour.
For betting everyone's credits gets put in a pool. If you bet 1 credit and someone on your team bets 99 credits, you will only get 1% of the winnings.
There's also a fee taken off the winnings. If someone bets 1 credit against you, 5% is taken off, and the number is rounded down. So if the amount is too small, it is rounded down to 0.