I am new here. I will give example of my confusion ,several weeks ago i placed bet of 30 satoshis on Bayern Munich against Borussia Dortmund, and i won around 50 satoshis but also got from the prize pool of that game around 1000 satoshis for winning bet, then i also placed bet of 50 satoshis on West Ham against Wolves, so i won about 120 satoshis but nothing got from the prize pool. Are they giving satoshis from the pool randomly? Hope you understand
How could you get 1000 satoshis from the prize pool while betting only 30 sats? 
It's the first time I ever heard such a thing. Could you share a picture of that? I think you are confusing with something else or you fell into a scam. Be careful if you received such a message from a social network or an email. Your prize pool is included in your final payout, you can compute it by subtracting your stake multiplied with final odds from your winnings.