Although a lot of work no doubt has gone into this, it seems to me like a bit of a pointless project if someone then must source their own data from various (and varying in quality and price) APIs. As mentioned, the entire value of Bloomberg is the data. Its not an interface which almost anyone can create.
You can find the core here: https://openbb.co/products/terminal#features
In any case, you are right. We rely on API keys because unlike BBT we don't own the data, and therefore, we are essentially a platform that aggregates investment research data - and that the user is allowed to customize their own feeds.
but also whatsapp and imessage from company-owned devices. The fines were about chat communications from personal devices.
Bloomberg provides you normalized data across all asset classes, cross asset portfolio analytics and management tools. First party trading venues, access to the world's largest broker network, immediate access to news including news sentiment indicators across the terminal offering. Access to it's own brokerage (trade book is still a thing I think), buyside and sell side Order Management platforms, APIs to feed the same stuff into your excel and servers.
Did I mention all this tooling is engineered to be compliant across regulatory regimes.
So yes chat is important and having a BB terminal definitely separates the men from the boys but that's additional to the indispensable functionality the platform itself provides.