Well it's kind of a truism. Zondervan is a company, they have to be concerned about profits, it's just how companies work.
This link does seem to indicate that this new openness may be a long-term development, i.e. not every Pradis book will be available electronically and they also will decide how to package together different books. So I would imagine this will be a slow rollout over time in order to create more sustained revenue flows. There are only so many people who are buying electronic products, you can expect to make more money off of them by releasing them in smaller doses over time rather than all at once. It's not devilish, but it is profit-oriented.