Just look for the one transaction that pays to different addresses. If they're all owned by Mods, it's likely you found a forum payment.
I had a look a few months back, just out of curiosity and it didn't seem like a huge payment unless theymos is paying them secretly too lol. I expected mods used to get more than a few thousand dollars per month as the workload should be huge considering all the spam generated in the forum and many other things.
For many years I wanted to know what the account would look like when you are a mod. I haven't found any screenshot yet, but it seems that the situation is not much different because when I had the ability to add members to my whitelist, all I got was whitelist bottom at the of each account.
Create a forum. This will give you the basic idea. I had the advantage to be a moderator on another forum software, wasn't a mod on SMF until I had to check it out through creating a forum for another purpose lol.