I don't know risking so much  seems really dodgy. Should be like 0.001btc minimum. You a new site you still need many many more clients before asking that much for deposit. I think it is better to lower it because you could be turning away people who are not willing to lose that much but won't mind taking a risk with a few hundred thousand Satoshi.

I accidentally found this forum and this topic on google .. where I can not find more details about all of these??

Does anyone else have experience with this?
It seems to me that it is ok, but I'm not sure.

This is a very good thing. Like this idea. 

I don't seem to understand