It's just a matter of price-anchoring. I used to charge the same rate for all clients regardless of whether the projects were closed-source or open-source. When

It's just a matter of price-anchoring. I used to charge the same rate for all clients regardless of whether the projects were closed-source or open-source. When I decided to switch to a dual-track pricing structure I pushed one option much higher (closed source) and one option much lower (open source). On average I still end up making the same (since I get a mix of both kinds of clients).