Ask HN: why Baidu cloud can offer me 2To when I register and not Dropbox?

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.