Just a last response. Thought about it a bit.
Note that this is all speculations:
Lukas was done with the service at 0:24AM. At the time of me logging in (2AM) the items were still on the account. Please note that I did not notify Lukas that I logged in on the account of Greatdan to check the bank and give back the 1.7M.
Why wouldnt Lukas take the items immediatly after he was done if his aim was to scam? He did all quests, logged off and didnt scam the coming 1:30hours. Seems unlikely to me that he would randomly log-on later on and take the items when he could have earlier, even before finishing all quests.
About me being possibly the scammer. I was trusted with a total of 50M in the afternoon (had 2 quest order going, 1 from Greatdan with a bank of 27M and another customer with a bank of 23M). Later that day I was trusted with 67M as I lost 40M to G3722 dicing. Both G3722 was paid out and the items on the account of the other customer are still there.
About Greatdan possibly faking it. Remember how I said to Greatdan that I had a new worker that I didnt fully trust yet and thus took some items off of his account to ensure his safety (Greatdan posted a screen about it)? Greatdan was allowed to log-in on the account as we life in total different time zones so he could have seen that the items were placed back, after Lukas had increased his debt. I dont think it is farfetched that someone could think "wait a minute, a not very trustworthy worker is working on my account and my items have been placed back on the account. Let's take the items and blame it on the not-so-trustworthy worker".
Just my point of view.