The person who finishes the day with most btslr gets rewards and of course the people who follow that as well so the more btslr you manage to win from gambling (if you lose you can claim again) the more bitcoins you will be rewarded at the end of every day and every week as well, it is quite difficult because somehow people are making thousands from small amounts but I liked it since it was free and gonna keep trying.
But Bitsler constantly has daily wagering contest where good players can get money from the free faucet, even if it's his own non-tradeable token.