Since i live in china, I have started using more and more chinese app on my android. I have discovered Baidu Yun which has offered me 2To space when i have registered. I was quite septical by the functionalities that it could provide me but later, I have seen their (Android/iOS) app gives me even more functionalities than dropbox.<p>This offer didn't have any time limit and last week, Baidu Yun has given to me 3To more so now I have 5To.
Baidu is not the only one who provides this offer, also Tencent QQ cloud gives me 30To.<p>Sure the only problem is that you have to be able to read chinese. However, the UI/UX of those App is very clear and you can do basic action very easily.
The chinese are probably overselling like crazy (not to say Dropbox don't), if a a few million chinese start filling up on those TBs they will run into trouble very quickly... but they know this won't really happen, so they just use this for marketing purposes.
/imho