score:7
OCBC Bank sponsors the "OCBC Skyway" and "OCBC Sound and Light Show" at Gardens by the Bay, as evidenced by this press release.
The reason they don't specify this directly on the official page you link is presumably that OCBC is one of the largest banks in the region, and most locals would see it like having to explain that the "HSBC World Rugby Sevens Series" is named that because it's sponsored by HSBC.