Hi, some days ago I sponsored my game with ads manager, I bought 50 credits for 10 days, so there would be 5 credits per day, the first day everything was okay, there were about 500 active users and the game had 1200 visits, but after 2 hours, the rate of the impressions decreased a lot, 1st day: 120,000 impressions, 2nd day: 30,000 impressions. and I was getting only like 10 active users for the same amount of 5 credits, does someone know why this happens? how can I fix it?