I have my own standard of 3D model usage terms, which are different than the poll options.
Rather I look at the amount of work on the model that is still mine.
I require credit as long as 20% of the model (vertices or polygons) is unchanged. Additionally, I allow the following edits of my model:
Attaching parts, cutting doors (making functional doors and equipment compartments), scale adjustment, converting a sedan to a wagon, making a truck cab have additional rear doors, a variation of the cab, or even converting one vehicle into another, with shared parts, and any major/minor editing is allowed. I also allow converting of vehicles from one generation to another (facelift, downgrade to original version) or full retexture, re-UV map. I am also fine with replacement of wheels, though in that case, the wheels are yours and not mine.
In those cases, you don't need my permission.
However I also have many models where I forbid editing, use or inclusion to other mods. Those are strictly not allowed for use at all.
Otherwise, my publicly released community base models such as the retro car set, modern car pack, or the lightbars are free use with credit.
If you copy the model by creating a new model on top of my work through tracing, but make the vertices and polygons yourself, the new traced model is yours because you made the vertices and mesh.