Each of those sites are just different landing pages for the same products. For example, all of their PSP sites give access to the same torrent download software. Platinum Partners should be avoided. I've been relentlessly spammed by them in the past, and their products have very high refund rates.
I have had a lot of success with their sites because they have so many different landing pages, it's easy to target what you are wanting to promote. People are obviously doing well promoting them otherwise their gravity wouldn't be as high as it is.
What's your conversion and refund rates from your personal experience? (i wont be asking your niche because you would be a fool to tell me )