Yes it should. If I know someone w/my same talents can come along and knock the same functionality out in a few hours it's going to make me push the price-barrier down so someone does't just come along and eat my lunch.
As an engineer my value is VERY tied to my time, and when I'm doing dev on my own business/products I am fully cognizant of this.
Anecdotal I know - but the word "undercut" is popular in pricing conversations for a reason... aaand I've been undercut by another engineer copying my product for a cheaper price before.
