Suspicious of Cheating!!

Hi everyone! I'm writing this because of a game I just played 20 minutes ago (on Voobly). I was Zeus and my opponent was Ra, and the map was Marsh. I did my usual tactic of attempting to gold-starve him, of which I was successful, but later on in the game, I realized there was a gold-mine I didn't see beside his base which even he was not aware of.

Why do I think he was cheating?

During and after the game, I did not actually suspect that he was cheating because Ra has an insane economy. However, upon looking at the post-game statistics, I was alarmed by the fact that in a 1 minute time span (15:38 to 16:38 to be exact), his gold gathering rate was ridiculous (while at other times, it was not). By this, I mean that in exactly 1 minute, he had an income of 4,837 gold, while I had an income of only 622 gold. That's almost 8 times more than me!

I looked at the replay and saw that in that 1 minute time span, he had 8 villagers on gold and I had 20 villagers on gold. I had twice as many villagers as him on gold and he had 8 times more gold income than me? Really? (And yes, we both had the same eco upgrade of shaft mine and he had no trade route)

Is there any logical explanation to this? Is it possible to have an income of 5000 gold in 1 minute with 8 villagers and without a trade route?

I’ve put up 2 pictures, one showing his total gold and another showing his total resources. So yeah, even if he did trade wood and food for all that gold, I’d expect his growth of total resources to be a little less. But no the stats show that even his total resources are extremely high in that 1 minute.

TLDR:

I was alarmed that in one 1-minute time frame, my opponent with 8 villagers on gold had 80 gold/s and I, with 20 gold villagers had 10 gold/s.

PICS:

https://imgur.com/a/llecb