To me, its a simple batch command and a zip. Maybe throwing it onto my cloud storage.
Whilst I also sell lots of Ivy packs, grown on premade objects, I also offer to grow Ivy onto a purchasers models. They need only send a minimal triangulated object mesh, no textures needed and the resolution of the ivy growth (i.e. dimensions of the model for scale). I work in OBJ format, as it gives better results. I can of course, convert the Ivy meshes to FBX. The textures are all PNG, so useable in all Editors/Engines.
It beats sitting and watching for sales to arrive, when I could be productive. I often collaborate in users projects, carrying out specific portions of the scenes.