Many people are wondering the same thing: because most of the work is done by unpaid third party, the actual cost structure doesn't seem to match their demands.

Many people are wondering the same thing: because most of the work is done by unpaid third party, the actual cost structure doesn't seem to match their demands. From what I understand, although the publisher is an academic non-profit, they handle the conference and outsource the publishing operation to one of a handful of a for-profit operator, most of whom are Dutch, iirc (Elsevier, Reuters).