Just to be clear...
If you deposit $1000, then what is the bonus?
I found this explanation on the caesars online casino
4. After registering for an account, make your first real money deposit of at least $10 to receive a casino bonus equal to 100% of your initial deposit amount (up to a maximum bonus of $1,000)
6. As an example, if you deposited $1,000 and receive a $1,000 bonus