No, the way it was done in the OT was that if someone had a message with a prophecy from God to declare, they would stand before the elders of that time and deliver it. The scribes would record and notarize it. That way, if it came true, it would be on the record who said it, and further attention would be paid to the other things they said. There was extremely little tolerance for false prophets, so such was rarely attempted. This is why we have the books of the prophets.
This sounds like it was more in line with mining bitcoins. If a "prophet" went on a lucky streak with his guesses then earned more street cred.
I like how you say "little tolerance for false prophets" yet according to you there was an entire system setup to record delusional rants. "Now serving Prophet #1,036,666. Step up and state your vision, please." What an interesting 9 to 5 that must have been for the scribe.