As an engineer, why am I being charged fees for the projects I complete?

Project fees.

Depending on your membership type you may incur fees on your projects. If you are operating under an Essentials membership, this membership is free but incurs a 10% fee on all completed projects, there is also an additional 3% fee for instant cash out transfers from your Dashboard to your bank. If you are a Pltinum membership user then each completed project will incur zero fees.