Bitmex build a map where we can see the links between people involved in cryptocoins and ICOs. The links are very clear and can get some indication of how some tokens are connected.
You can see here a snapshot of the map; for the interactive ICO team member network map visit the bitmex page):
Market share of advisers:
https://blog.bitmex.com/initial-coin-offerings-icos-a-complex-web/