Thanks for the explanation, Realmling. My goal was not to prevent people giving freebies, or to belittle anyone, but to find out why, since it's very annoying to me, lol.

I create my freebies and store items the same way you do, but when I zip them I simply don't include the top-level folder I use as categorization. Couldn't you do the same so that the zip has Runtime as the top-level folder? It's not difficult, but maybe it's just not something you've tried to do.
And doing this doesn't prevent anyone from performing the action you perform when you unzip something. But for those of us who like to keep things simple, and open and extract without any other hassle, it keeps us happy ;)

I also have a full-time job, Poser stuff is a hobby, but there's still no need to present your categorization system in the distributed zip. Just drop down one level, that's all it takes ;)