The only people you find complaining on Bitcointalk for the most part are competitors or known trolls like Entropy, Bicknellski, etc...
To answer your question though: No there is nothing valid they bring to the table that qualifies as a scam. Just angry butt hurt trolls who can't stand the fact that all their idiotic "predictions" and false claims turned out to be lies and they are exposed for what they are. So they try to flood the threads and forum with more junk in hopes that people will forget.
try not to drop the soap beeyotch !
I was right... I was right!....
Mind you so were about 100 other people 12 months before I opened my mouth in 2013.
i just hope justice gets served. they stole millions from people who took a leap a faith and wanted to be a part of the bitcoin community. i purchased a jalapeno at 50 Million difficulty and received it 8 months later at 1 Billion difficulty. Chinese manufacturers are the fastest at producing anything, so for them to claim it was manufacturing issues is BS. send each one of those j-cat lames to jail.