Do you think everything is so easy as you want. To increase prizws website have to generetae 2 times more income. Rewards will be always remain same in $ value, no matter how much btc will cost. So, don't be surprised if in future minimal reward will be 1 satoshi. I'm happy that I used freebitco.in were they were giving 1000 satoshi hour, it was easy to earn big amount of btc, which is worth many times more today.