Didn't mean to disparage Polish software development; just was assuming the average user of the site wasn't Polish, leaving them even less legal security— which I see, glancing at the site now, was wrong. So apologies to any offended.
With that said, I think you could pick a better site to be the shining beacon of Poland's world class talent than the site that just lost a bunch of people's money because the only place they were keeping it was on a single EC2 instance store. If this is the top, I'm not sure I wanna see the rest of the class.
These particular developers, though, were probably not world-class. Data this important simply should not be lost due to trouble with an EC2 instance; any data on an EC2 instance, even on EBS (though somewhat less so for EBS) should be considered liable to vanish at any moment.