I just lost money on DraftKings, the $1 billion fantasy sports site - and I'm probably never going back

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DraftKings TV ad

I'm a pretty big sports fan and love playing fantasy sports.

So when I heard about daily fantasy sports sites, where you can bet real money, I had to give it a try.

But I ended up losing money. And I'm not sure if I want to play there again.

Here's why: