Huh? The 4% interest is actually annually. Once a year
For 1 btc deposit onto the site, you are getting around 0.011% daily so around 11,000 satoshi interest daily. So is this a good amount daily to gamble for FREE ? Depends.
If you are a small time gambler, this should be sufficient for quench your thirst to roll some dust bet but if you own 1 btc or even larger amount then this might not be as good as it sounds .
Bottom line : Dont risk your 1 btc into a site to get 11,000 satoshi daily. This is not a bank, keep only what you can afford to lose on the site. Things can always go south
There are no guarantees in life, but not risking anything will never bring any huge rewards. My motto : It is better to burn out, than to fade away.
That's why I always confuse to those people who always give guarantee on everything since for sure they will give you an unrealistic results and if we will get caught we will end up crying and wandering on why we lose our money for that schemes. But we should not put a negative thinking and just stay away on all possibilities since if we just believe on our self and risk on our skills for sure in on day we can see a better results in either gambling or other things.