Welcome to the Community, @StirCrazy.
There are a few things to consider here:
- As you noted, 5-per-hour is a maximum (you may not see that many)
- Ads are region-specific, so it depends on how many campaigns are active in your region
- Brave uses native messaging APIs, so things like Do not Disturb and Focus Assist can prevent ads from displaying
More information available here: FAQ: Why am I not seeing Brave Ads?