Rewards count per device/wallet?

Hello I have question according brave rewards campaign limits and couldn’t find answer to my problem. Last month I recived ~0,33 BAT to my wallet, but I had in total more than 100, closer to 200 ads in rewards screen on my browsers on multiple devices (4 in fact, 2 android phones and 2 PC windows browsers). There’s my question, is the amount of BATs limited by campaign restrictions per device? or per wallet? Because each campaign in my region is limited daily/weekly/monthly/total according to: https://sampson.codes/brave/ads/my_region/

If for example one campaign is limited 20/–/–/20 and I am watching 20 in one day on all my four devices, Am I limited still to the total 20 per campaign, or should I recive BATs for 80 ads?

I just want to understand how does the limitation work, if the amount I recived is correct, and what’s the reason for that much downscale of the reward this month, according to the link above I should recive something between 1-2 BAT (0,01 BAT/ad), is my mind going the right direction or reason is completely different?