Screensaver with Kindle?

Hello there!

Using KOReader through KUAL on my Voyage. koreader-nightly-20170430, and latest Kindle FW (don't remember the exact version, rats; it's the one that came out a few weeks back).

So my question is: since the Kindle Screensaver hack doesn't seem to work with KOReader, is the KOR's screensaver options supposed to work on Kindles? Because it does nothing on mine...

Thanks!