You are currently using Google Chrome to get your Coins. The problem with Chrome is that every 2min when the page is refreshed, the video player stops if you are playing on CSGO or just browsing in twitter for example.
The problem: When the video player stops, Prizes4Games can't make money with ads. And if we can’t make money with ads, it’s impossible for us to give you skins for free.
The solution: To avoid that problem, we found that Firefox will
never stops the player even if the page is refreshed.
Conclusion - If you want to get your coins AFK (automatically without doing anything) you have to use Firefox.