After reading the other member's 3 Years with DT, I just like to make a joke and tell you my 3 months with DT.
First month had 1 sale, made $2.6, 80 images online;
Second month had 0 sale, 126 images online. Almost made me hopeless;
Third month had 20 sales, made $33.88, 165 images online. Stay alive again!
Plus 20 cents each image getting from DT as exclusive member. I've earned $117.5.
Now is the beginning of the 4th month. I already had 3 sales. I guess it won't give me heart attack again like the second month.
Conclusion: On the third month, you will be on the right track. You have to work on it almost every day though. No pain no gain! Now I have 388 images online. I guess that is not bad because I started to take pictures when I started to sell images here. I only had a few images from before that I could use.