Shared folders shouldn't occupy your own Dropbox space.

[yuliaUU]

I find it extremely unfair that all people have to pay for accessing a folder.

If one person pays extra to be able to store large amount of files, why people who this folder=is shared with have to pay for it too?

Make it only available through web app and not visible on desktop- but don't ask me to purchase extra space for things that I don't own 

[Megan]

Hey @yuliaUU, thanks for posting here! 

Your feedback regarding this has been very valuable and I will endeavor to make sure your voice is heard.

I'll forward your feedback to the appropriate areas so we can continue to improve.

If you need anything else, let me know!

[username00001]

That's why dropbox sucks. They get payed over and over for the same data. Just share your files and make dropbox see the cash. Every other cloud figured it out, that only the owner has to pay, but not all participants. 
Why is dropbox so annoying. Sorry for my frustration but it really sucks.