Current daily mining profit for 1 TH is 13021 satoshis, my last five payouts on hashflare were around 14500 satoshis per TH.
Are the pools just lucky atm or is there another reason for that?
I doubt they finally pay the fees additionally to the block reward.
Probably the additional amount is just from the fees from every transaction confirmed by the pool you are pointing plus the luck of the pool. The 13021 satoshis you are saying is just the estimated earnings per ths having just 100% luck