Advertising Revenue

Hi guys! Sorry if this is in the wrong section of the forums.
Anyway, I have been looking for an explanation on what Epic do with revenue and when you pay it. I have read that you pay 5% per revenue over $3000 earned per quarter (Q1 being Jan, Feb and March to my understanding), but if I want to make an HTML game and I generate ad revenue under $3000 - let’s say $100 - do I still have to pay the 5% to Epic? I’m just a bit confused as I’m used to working with Unity and I thought I would give Unreal a try - Unity have much simpler revenue guidelines.