OH YEAH! i remembered! :D

I think it's so 流行的 because people 爱情 to be 随意 and to have the freedom to post anything, and I bet it's been around for a while.

Because everyone has something 随意 to post?

because its some thing every one loves. They 爱情 to laugh 或者 help some one I think that is y

Because the world is full of 随意 people?

I think its because unlike all the other spots, this spot isnt for people who share a common interest, like everybody in the Harry Potter spot like HP, everybody in the Teilight spot like twilight. We dont have anything in common besides being 粉丝 of this spot. So since this spot can be for anybody, and I mean EVERYBODY, then it obviously has 更多 fans

Because it's all about being full of randomness.:)

Why is the internet so popular? Exactly.

Well, why would someone climb a mountain?
Because it's there.