I won a 6 hours bonus in the champion's race, but it came as I was just
checking the game at night. I could not play then because I had to
sleep, so I just didn't press the "Claim" button but just kept the page
in memory. In the morning I clicked on the Claim button, but I didn't
get anything. Apparently, the six hours elapsed even though I didn't
click on Claim.
You really should put an option to use these six
hours later, because it's very frustrating to win a price in this
difficult contest and then not being able to enjoy it.