content: I think part of their (former, not sure about the current state) success in China and Japan was that the character limit was not so worrisome there as you can fit more information in less characters. 'Education' is 9 characters, but in Japanese it's 2 (教育). 'What do you think about X?" can in Japanese be shortened to "X どう？" adding only 3 characters. It might have meant more sense to use something like 260 characters but 10 000 is ridiculously long.