So at the very worst case scenario if vlom basically said "give me what you owe and I will remove the negative feedback" that is not extortion
I am confused a little bit, because Vlom said that he never invested anything into that scam. So why he was asking for a non existent refund?
two things you have to know:
#1: I did not invest 5 BTC in this ICO.
#2: I just wanted to check what the NVO-scammer will do.