ptcsense, bigmoneyptc , dollargpt , genuinemails

I found few amazing or very posibly total scams sites . Ptcsense, bigmoneyptc , dollargpt and genuinemails . Does anyone know something about them ? All them seem to be advertising each other so i put the in one thread.
www.ptcsense.com
www.bigmoneyptc.com
http://www.dollargpt.com
http://genuinemails.com