Is it true that Hashfast_CL is also behind market leaders such as CTSminers and PhotonicMining?
No, PhotonicMining is way to well done to be related to HashFast their website scrolls for starters and it is a creative scam. HashFast is just a BFL scam clone ripoff.
Stop insulting Josh. He may be a scammer, but he's way smarter and his company has been way more successful than Hashfast.