RPG kickstarters: hardbacks only

There have been several kickstarters recently for RPGs for which there is no paperpack production. Why is that?

I assume there is a straightforward financial reason, but aesthetically I'm a huge fan of paperbacks and not so much of hardback books. It doesn't hurt that paperbacks are generally more affordable, but cost isn't even my primary concern.

I'm hoping what I'm seeing is not a trend, and if it is that it will not continue to be a trend.