Not everyone who deposits is in negative. I have deposited a few micros and my balance is still positive (a few micros, as well
). Have you checked the weekly caesars leaderboad?, at least half of the people there have had a nice profit, a profit that seems very unlikely to come from faucet only (if it comes from the faucet, you have to teach how to wagger 50k+ mBTC per week just from it).And the problem with gambling leader boards is that they aren't showing complete picture but rather present you these 'luck spikes' people had.
Like you said if there is lucky you wont be negative, this apply to bolded part. Although you played it everyday but if you try to set the limit of your play, I think you will have a great profit. At least you will double your deposit for sure.