If you are not the creator of a custom indicator or EA which you are using, then you should check the licence conditions before using Slingshot to distribute the indicator/EA. For example, you are not allowed to use Slingshot for public distribution of packages which contain any of FX Blue's own apps.
FX Blue will delete your package if we receive a substantiated complaint that you have included someone else's custom indicator or EA which is not freely distributable.