If he KNOWS, then he knows. And I would say if we are talking about numbers that big, the only reasonable conclusion would be cheating.
If we are talking about someone who sets their orders in the morning on the PS4, then checks, cancels and resets later in the day at work, and then comes home later to play in the evening - and the values are not really significant ... I'd say you have a different scenario.
I can tell you that I always have a general idea of how many stubs I have (as well as my inventory) but I really wouldn't know +/- 5 - 10k. Its really not that easy to track when you make hundreds of transactions per day.
And yes, I made hundreds of transactions every day. I have made thousands of transactions and generally make enough to get 1.5 sets done each week.
Bottom line, your example of 60k and my example as given are basically hypotheticals at this point because SDS has not revealed much information as to what the infracting actions actually were and how much was taken. Per Ramon's twitters yesterday, one guy made 3 million over 30 transactions (obviously cheating), but another guy made 100k over 48 transactions - how can we be sure what that means without more information for that guy? If he had a transaction history like mine, you would be looking at one transaction ever 3 days for a few thousand - but in the meanwhile he is making 10x that by just trading. Doesn't make sense.
Also, what is 48? If you clear a slate of buy/sells and only 10 are buys - is that ONE instance, or is it 10? that basically means if a guy cleared his queue from a computer 5 times in 3 months, you are ready to run him out of town? I would not feel comfortable with that in light of the fact we lack context and information about this.
I am quite comfortable banning players that have all the telltale signs of exploiting - that is easy and i have posted them previously. It is obvious they are cheating, but it still requires an analysis of their transactions to make that call.