Here is my theory: Most likely this huge investment is a way for investors to get their money from their previous investment, which might be locked up due to s

Here is my theory: Most likely this huge investment is a way for investors to get their money from their previous investment, which might be locked up due to some contract rules. Basically, in order to free their funds (or avoid taxation) from their first investment (let's say from some portfolio company of Benchmark/or other participated investors), they will transfer funds from the big company to the small company aka Quora (in which these investors got a better contract). I am not going to be surprised if Quora gets acquired from the bigger company, which happens to have the same investors ;)