It's the lie that did it for me.
Maybe it's not a lie, just missing info: "Chinese" in the front.
First I thought it's bullshit too, but then I thought again. We often forget that China is huge in terms of sheer manpower. So let's see:
There are 1 billion Chinese.
Let's assume there are 100 million gamers - 10% of the population.
From those let's assume 5% dedicated fans of Winnie the Pooh. Which is an extremely low estimate, if you look how leadership cults work and considering life-long indoctrination starting in early childhood. That's 5 million gamers in the Winnie-Fanclub probably well organised in what they have for Twitter. And's just the dedicated fans of the leadership, not counting their wider circle of people who just tag along trying to make a good impression.
A nice theory, but you are forgetting that Twitter is blocked in China.
So, it's more likely that any such Twitter campaigns are organised efforts by the government, or in the more unlikely scenario some fanclub outside China.
If it's indeed people inside China, that would be a very ironic thing to happen. People would be violating the governmental censorship in order to support the government that has created the censorship to begin with!
Not a very likely scenario, that one.