If I am understanding this correctly, if I upload my tile sets to the Market Place then I don't get that storage applied to my personal quota of 100 MB. Now I have designed these specifically for Roll20. I want nothing for them, if Roll20 would want to charge for them I don't care. With these Tiles just about any fantasy setting could be created, but they aren't very useful for a modern setting.
Now here is my real point, if I upload them, can I delete them out of my Personal Library without it affecting my existing modules (campaigns)?