DutchAdultDesigner

I've had this problem with 3 of my sites now.
I set them up crop thumb and make a design.
Then I add 10 trades or something like that.
And it starts rolling, without doing anything my site goes up to 10k without buying traffic.
I have a productivity of 400% or higher on some trades so I sent out like a mad man.
This goes well for a week, but then you start seeing the problems.
The trades only return like 60% or even less, but they have a very high productivity.
So the sites stop growing.
Simply because I dont get enough traffic in.
Probably because my outer productivity is too low.
What can I do to improve that?
I've skimming 60% with first on now but it used to be higher, like 75% with first on.