Bitcoin exchanges trade 7 days a week. There is absolutely no reason to stop trading at weekend.
So the explanation I see is:
The stupid scammers are used to scam forex people and now try to scam also bitcoin traders, while not spending much time to investigate if bitcoin is traded at weekend.
I think I am seeing it from your point of view now and I never really did think about that at first most especially since I do not have a trading knowledge. That is why legends like you are absolutely there to help us. I will probably start asking questions more regarding this as you really have a point with the weekend trading but I guess I am already stuck with them for 8 months now.