Not only related to Photoshop:
With this class you able to read file data from ZIP files.
I frequently use a lot of external files in my PS scripts that are loaded at runtime (e.g. language files).
Ziping all runtime files adds a liitle more structure and a tiny bit mor security because the files aint that accessible.
Mainly I simply like the case that I can load different kind of data (text, jsxbin, xml) using one class.
Maybe you'll find it usefull too.