I see the payout amount is different for everyone?
I am getting 177 satoshi per hour for example, I started early with 196 like a week ago. Why is it dropping constantly?
Obviously you are able to read some, but understanding it all, well, not that well?

Payout depends on US dollar vs. BTC exchange rate!!!

FAQ from there:
*quote* Why does the amount of Bitcoins that you can win, keep changing?
The amount of bitcoins that you can win with FREE BTC
depends on the current bitcoin price and the biggest prize is fixed at
US$200 and the other prizes in proportion to it. So, when the price of a bitcoin goes down, the reward amount calculated in bitcoins goes up and the other way round is also true. So, regardless of the current bitcoin price, you have a fair chance of winning US$200 in bitcoins on each roll.
*quote end*
This should be rather simple to understand.