is this normal?
We love Themeforest, but this is horror. We also use Shutterstock affiliate and it works wonderfull!
Do you have same experience?
Depends how you get your traffic.
For instance I get about 500 clickthroughs & 30 registrations per month from the custom bar on the top of my item previews.
If you’re just featuring themeforest items and linking through, then likely you’ll be getting a lot of the “free” crowd, who were never looking to spend anyway.