I sent the btc to places I thought were going to bring a good return. So no this wasn't a scam. I got scammed and that is why I'm not able to return all the coins.
And yet you claim to have no records which can prove that a single BTC of user funds were sent to pirate or spent on hardware rather than blown at the casino or spent on hookers and blow.
Are you as careless about keeping records related to your non-Bitcoin dealings?