They have some funny accounting like Google and Microsoft where everything is "cloud" but the revenue streams are certainly diversified from straight Oracle DB such that PostgreSQL equivalence or superiority does not affect the viability of the company or the stock price. Communities like this often over index technical and personal opinion with reality.

I worked at a midsize that was core internet infra, where we had an in house OS and ODM hardware and FOSS DBAs. The one Oracle DB and Oracle HW was slipped in the door through finance for ERP as you say. Although I suspect that would be cloud hosted these days.