It doesn't. But people aren't rational -- they'll reject a good deal (including free money!) if they think the person offering the deal is making out better than they are.
I think you guys are just looking at value differently.
I didn't know about either of your companies but by the discussion, its clearly possible for Tarsnap users to derive value from the trust associated with transparency and feeling like their dollar is maximized.
tptacek, pricing schemes aren't the only component of the purchase decision or profitability. His users are making a more emotional decision. cperciva should stick to the core of what his users are finding valuable...then get bought out and turn into an evil profit maximizing company