Less do small calculations so you will know your exact earnings.

Total supply of hamster is 100 billion, with $1 billion dollars hamster will list at $0.01

With $500 million hamster will list at. $0.005

Now on listing you will only be getting 12% of your total earning.

Then let say your 12% is 115 x $0.01 you will get $1.1 at 1 billion dollars market cap.

If at $500 million market cap you will get 115 x 0.005 which is $0.575

If this happens, Then hamster is dust.