> Why make source available at all if you are just going to release proprietary software?

Because there's years between one decision and the other, and in that time it turned out that because the software was open source they were structurally disadvantaged versus large cloud providers in being able to make money from it.

It seems disingenuous to suggest that the open sourcing was in bad faith given it happened years and paradigms apart from the closed sourcing, even though I don't agree with the decision either.