It's very possible that he have personal problems. But he is loging in to Bitcointalk very often, is it so difficult to drop an message and say that payments will be delayed or that he can't make payments currently due to some problems. People would understand him and would have more patience before starting to accuse him.
True. Its just an odd situation to find a member who has a very good reputation such as Lutpin to not be outspoken about this situation. There's obviously a reason behind this. But that reason really isn't clear at the moment. I'm trying to think what situation would actually make this logical but honestly your right in that they simply have to drop a message.
Even if they are having personal issues if they are logging in regularly they could be very vague about the situation and not actually share their personal issues but just say things are delayed or they are busy at the moment or whatever.
I don't know its just a odd situation.