That may be so, but >90% of the work on this particular Eclipse project is done by IBM. Just as many companies contribute to OpenJDK but it is primarily an Oracle project, and Oracle does most of the work, Adoptium is an IBM project. That, in itself is not good or bad (although it is somewhat bad because, unlike other JDK distributors, IBM is barely involved with OpenJDK and the IBM team that makes the Adoptium builds is not particularly familiar with OpenJDK), but it is certainly not a "community led" distribution -- it is, de facto, an IBM-led one. It did not start out this way, but it has been this way for several years now (they did the same with https://en.wikipedia.org/wiki/Apache_Harmony).
Are we talking about the (Open)J9 flavor here? It was featured more prominently on the AdoptOpenJDK page, but has now all but disappeared on the Adoptium site. J9 is something that I can definitely associate with IBM, what I'm having a hard time with is connecting the work on HotSpot builds to the company.
I'm talking about the Adoptium (née AdoptOpenJDK) builds, which are made by IBM. IBM aren't involved much with OpenJDK, but they can still run `make` on server farms. Although Eclipse OpenJ9 is yet another IBM project.
