So far $1.27 - of which I could loose up to 30% if I do not get an ITIN as I am not a US resident. Cost was zero because I have only just joined DT so have a good stock of images already taken - and therefore as good as paid for - however the sums may go the other way when I need to start taking images specifically to submit.
The same for me ... negative profit ! It is my pricey hobby ... this year, I had two lenses broken and more that 400€ for repair and still, the result of the repair is not well done -> asymmetric sharpness and have to fight with the service. But, having pictures uploaded here is worth all the pains ;) sold or not it is not a matter.