"Baidu requires users to sign up for its in-house online payment platform and then pay 1RMB (about $0.15). But it’s still a full terabyte of free space, all for a few clicks and email address submissions."
...so it's "all for a few clicks and email address submissions", with exception of money of course!
The first 1TB is free, the next 1TB is 1RMB. At least from the comments, that's what I got.