But those have a tangible return to society that people flock to. Almost the entirety of Google products is open to anyone on Earth to just open up an use because that ad model is so successful. People click high value ads and it covers to cost of video distribution to anyone with an cell phone and wifi.

Jane street on the other hand is arbitraging against regular folks money, so they can distribute the gains to their select high value clients. There is no free office productivity suite and limitless "How to repair cell phones to start your own business" videos distributed to everyone for free.

In a way, they are doing opposite functions. Ad media takes from people who buy stuff and gives to people who don't (or cant't) buy anything. Jane street and their ilk take from regular people and give to those who have everything already.