There may or may not be a fourth customer. Remember the way they recognize Revenues is to make an accounting entry transferring Revenues from the deferred revenue account on the Balance Sheet. Some Revenues could be current cash payments for services but most are just amortizations of contracts whose revenues were deferred previously.
The 4C which is a cash based statement will be far more interesting than debating where Accounting Revenues arise.
UNS Price at posting:
3.8¢ Sentiment: Sell Disclosure: Not Held