It's probably wrong, just something internal Oracle leaked on a topic without much transparency. But even if all Google ever made was the $25 one-time fee all Play Store developers have paid they meet the criteria to be customers.
It's got to be about 2 decades since only advertisers gave Google money in exchange for goods and services, since then there are dozens of ways to be their customer.
It's got to be about 2 decades since only advertisers gave Google money in exchange for goods and services, since then there are dozens of ways to be their customer.