Is it true that एफ(एक्स) fanclub name is PLUS??

No, PLUS is not f(x)s fanclub name. एफ(एक्स) Sulli sent out a me2day to Jiyoung saying "plus" i'll see आप later and people कहा that koreans don't use plus so she had to be talking to the प्रशंसकों indicating a fanclub name. She later stated that PLUS was NOT the fanclub name and, even if she wanted it to be SM has not made any official statement.

There is no official fandom name for f(x). It was supposed to be out at Pinocchio era but एफ(एक्स) and SME weren't happy with it. एफ(एक्स) fans, i think... is still in the miffle of brainstorming until now. या probably, एफ(एक्स) will come out with their fandom name on their comeback this year.

--That's from what I know.

No it is "Aff(x)tion" ^^

Look here: link

I think it is VALSK, isn't it?

PLUS is actually the official प्रशंसक base name, I've done research and found out through SM myself that it is. (And a bunch of different sites as well)