It's possible. You can either right click on the app in Impulse and pick "Archive" to make an offline copy, or you can use Impulse Anywhere to download an offline capable installer.

This is an area Impulse has always been good about.

People should try to keep in mind that as much as we love Elemental, it is a relatively small part of our overall company.  Our games business is not what pays our bills. It's been Stardock Software (the enterprise group in particular).

Even without Impulse, 2010 was a very good year for the company.

Please see https://forums.elementalgame.com/407127 for further discussion.