An observation of discussion forum

Recently, I came across a post in a discussion forum, it reported that the following question generated >3000 replies in a mainland discussion forum. Here is the question:

Richard bought a chicken using $8, he sold it for $9. He then bought it back using $10 and sell it again for $11. Question: How much does Richard earn?

I was surprised that such a question can generate >3000 replies, so I followed through the thread, which also has >100 replies, to try make something out of it. My observation is that
1) 10% of the replies are saying that the answer is 0, 1, or 3
2) 70% of the replies are reiterating the correct answer 2 using various mathematical/ economic/ accounting models.
3) 20% of the replies are simply junk.

Any conclusion from the above observations? Well, may be the following:
1) The web is being filled with junk.
2) People are not using their time wisely on the Internet (including me).
3) Anything can happen beyond your imagination on the Internet.