I have done some calculations on bitcoinwisdom for 1Ghs/day you get 0.00001834 btc And on Havelock it stays that for 1 share of Petamine which is 1Ghs is paying only ฿0.00000408 for dividend. But I am not sure how many times they pay the dividend per day.
Bear in mind dividend fluctuates. Variance is one reason. 3 days ago div was double 0.00000835 for instance, Yet a day before that it was 0.00000752 and a day before that it was 0.00000644. A day before that was 0.00001047.
The fee is not the cheapest, absolutely. (the fees decrease if USD/BTC rises, with PETA, and increases if USD/BTC drops)
Just bear in mind you also own the hardware with PETA and retain voting rights. You should do own due diligence before investing but in my calculations PETA still works out cheaper than hashnest.