Hi, @Flowry, Support is aware that there is some issue right now with the ads and are working on it.
In the meantime, you should read this FAQ about Brave ads and Rewards. Just because you have it set to 5 per hour, it doesn’t mean this will happen. You can learn more here:
Make sure to check out the additional links there, too. They can help you make your settings optimal for receiving ads’ notifications.