I just tried the telegram dice game, it seems to be working good, I got 1000 satoshi for free to play with, how much balance do you need to have to be able to withdraw?
I've also tried the bit and it looks like you receive 10.000 satoshi free, not 1000. Minimum withdrawal is 0.01btc and I guess only when you reach that amount you can add a withdraw address to your account. Also it says that a withdrawal is usually sent within 2 hours. All this information you can find by clicking More and then FAQ.
I think the minimum withdrawal is way to high especially because this is a brand new dice game and its also running on telegram. Minimum deposit of 0.001btc is fine but you need to make minimum withdrawal lower something like 0.002btc or so.
The minimum withdrawal is really high they should try to lower it so others could try to withdraw and vouch for them.
It is hard to trust this new gambling platforms and specially in telegram how could we know if it wouldn't end up being scam?