Okay, yes. Theoretically you can do that.
I also have a script that fuse-mounts my copy.com cloud storage to my local machine. Such usage tends to be very slow due to the overhead of constantly downloading and uploading info -- much better to sync it all and just imagine that the local copy is a cache.
(I used it only to upload stuff without requiring a local install+sync.)
I feel safe assuming the vast majority of people are not doing any such thing.