Thanks for the insight @cryptomatrix! Yes, it's a very interesting scenario where Robinhood and Cobinhood are two different groups/companies altogether.

There is apparently a cease and desist order for likenesses, but I wonder if it will stand up to litigation.

Sources:
https://cryptocurrency.rodipex.com/robinhood-adds-zero-fee-cryptocurrency-trading-and-tracking/
https://www.axios.com/robinhood-stock-app-sends-cease-and-desist-to-crypto-upstart-1513305691-59b326e1-b627-4950-969f-77cbe8e56609.html
https://techcrunch.com/2018/01/25/free-cryptocurrency-trading-app/
https://www.reddit.com/r/cobinhood/comments/7p3an4/cobinhoodpotential_scam/