I'm not exactly sure what the OP's point is, but the price/employee ratios do not make any sense outside of acquihires.

Take US Air for example, they have 30k employees and are worth 2B. That ratio is meaningles. It is even more meaningless when one programmer can eliminate 100s of jobs using automation.

I'm sure it is a useful metric for some analysis, but it doesn't seem to be in the case of instagram which seemed much more like a play to remove a question mark from institutional investors minds prior to an IPO.