dgarretson
Please provide a more specific reference regarding the illegality of disposing-- for profit or otherwise-- of an original CD after making a digital copy for personal use. The RIAA seems to be vague on this point.
The RIAA obviously has an interest in this matter, but it is not an arbiter of copyright law.
What's often misunderstood about US copyright law is that it isn't really based on assuring revenue for content creators. It's actually based on artists being able to control distribution of their work. The revenue then flows from that control.