Not the author, but given that this is a relatively small UI wrapper of a zoekt[1] backend, it seems like the risk here is isolated to the upstream Sourcegraph-maintained search dependency. By relatively small, I mean that the total SLOC for UI code in the entire project is around ~3.5k (compared to the backend which is currently 25x the size). Seems difficult to ascribe any enterprise motivations given that and additionally the UI seems very useful as-is even if you had to fork it and build a new community from there.
There's not really "risk" either way, I'm a fan of open source and I'm also a fan of businesses making money, I just don't want to donate time and energy to a business.
What they've described smells a lot like a thing that needs to become a business — see Sourcegraph — and Brendan [0] and Michael [1] are currently working together at a startup they founded.
I'm getting tired of seeing other businesses pissing in the pool by claiming to be "open source" purely for the marketing benefits, so I figured I'd ask up front and see what they say.
Should be a simple answer either way!
[0]: https://www.linkedin.com/in/brendan-kellam/
[1]: https://www.linkedin.com/in/msukkari/