Hazel and MacUpdate

New Hazel user here. I have Hazel monitoring the Trash for deleted apps as suggested in the setup. I've noticed that every time I run MacUpdate, Hazel kicks off asking if I want to delete files associated with the apps that were updated. I don't know if MacUpdate is moving old versions to the trash or moving the downloaded version there after the install.
Does anyone have experience with this? Any advice? For now I'll continue using MacUpdate. Should I stop having Hazel monitor apps in the trash?
Does anyone have experience with this? Any advice? For now I'll continue using MacUpdate. Should I stop having Hazel monitor apps in the trash?