If 1000% is calculated on base reward , then what you are saying is correct. But I was normally getting 100-130 sats per claim even before applying the bonus and if 1000% bonus is calculated on this amount then my current claim should be around 1000-1300 sats for the next 24 hours.
It is always calculated on the base reward as stated on the page when you redeem it.
Redeem your points to increase your minimum free FREE BTC reward! Each bonus is valid for 24 hours after redemption. This bonus will only increase the lowest prize in the FREE BTC table and only the base reward will be multiplied by this bonus and then added to any other bonuses that you have currently.