Look at this:
-Buy a KAPK app. This includes 10 KWGTs.
-The customer copy all its widgets.
-The customer claims a refund in the play store, which will be accepted because the term is 48 hours.
-He still has the 10 widgets (because he copied them to anotera preset), and you earn $0. Practically you have been scammed.
Feature request? Probably it's not possible to protect a preset, but I think itsi posiposs to protect a Komponent. Maybe a second check? ReadOnly and CheckApp? So, if the komponent is locked, its items will dissapear if [X] app is not installed.