"But what if at some point they decide to be as "open" as OpenAI (ie., not)?"

Aisde from some of the academics and the "gain and share knowledge for knowledge's sake" types they hire why would they care?

For the record, I don't like the idea of scientific research becoming proprietary. At all. But is there anyone credulous enough to think these organizations would willingly risk their bottom line for principles like "openess" and not just play the PR games to make themselves appear open and concerned?

In other words "Don't LOOK evil but do evil when no one's looking".

The Frances Haugen already shows how damaging such openness can be.