Does a Dropbox shared folder occupy storage space on all accounts

I have to share photos and video of an event with a number of friends, and I'm considering to use Dropbox for this purpose.

Since the initial storage space offered by this service is not really that big, I'd like to know if a shared folder occupy space even in the accounts of the "receivers" and not only in the "sharer" one.

Example:

"A" creates a folder whose total size is, let's say, 200 MB; the total storage space of "A" is of course reduced by 200 MB; if "A" shares this folder with "B", "C" and "D", even their total storage space is reduced accordingly, or the folder is considered to be "owned" only by "A", and only his account is affected?