I was told that if I deposited an amount up to $400, they would equal my deposit.

What they didn't tell me was that in order to see the $100 they promised me, I would have to spend $1000 on fees, which means gamble about $10,000.

In other words, their great sign-up bonus amounts to a limited one percent kickback of the money gambled.
While this is obviously a weak bonus, the part that disturbs me is how misleading their offer is.