That´s technically normal…
Ads depend on:
- The number of ad campains on your region
- The number of publishers also in your region
- Your browsing habbits (Similar on when you search for a phone on amazon and the suddently you see ads of that phone in everywhere).
Also the “5 ads per hour” doesn´t mean that, it realy means “up to 5 ads per hour”. Is a limiter to avoid spam in countries with lots of ads campains. Said that, it does´t guarantee exactly 5 ads every hour.
Also if your region has low ad campaings, it sound normal those 5 ads per day. In my country we have 12 campains, i get more less 15-18 ads per day, but that is not law, sometimes i get 10, 5 or none. This is how system works. Also be thankful you are reciving ads, some users since “july bug” are not receving any, and the fix is still on work.