Mr Papa said
not sure… so you three memberships can only see the three private forums, but no other forums? sounds odd, but if what you want, should be right…
Steve, they should see the other forums but have no access. Just like on this site. If I come here and do not login, I click on a forum, click on a topic and I get redirected to a page that explains the 2 levels of membership. I need that.
also sounds like each of the three memberships can see all three private forums… no difference between different memberships… again, if what you want, sounds right..
Correct, just like on this site. The difference is the time. Silver Membership expires in 1 month, Gold expires in 6 months, Platinum expires in 1 year. But they can see the same 3 forums.
so on the other forums (not the 3 private), if members try to read them, and you did the sneak peek as you say, then yes, they wont get access but be redirected to page… again, sounds backwards, but if what you want, sounds right…
The existing members are supposed to keep on being able to do everything they do now. All the forums must be visible to everyone, guests included. But they cannot read the content of a topic, when they click they must be redirected to a page that explains the different level of membership and they can sign up. Once they sign up and pay, they must be able to access to the 3 new forums only. Just like on this site with the page /membership. The existing members should continue as they are now.
What is the sneak peek? 
I would suspect you have a bunch of open forums that anyone can access (guests?, users and membership levels)… then you have three private forums… typically, each membership level would be mapped to an individual private forum for just that level… anyone else clicking would go to the sign up page…
I have a bunch of forums. Everyone must be able to see them but NOT access them, just be redirected to the registration page. The existing members, who belong to special ranks, must continue to be able to access to them normally.
Wow…it’s harder then I thought it would…
I need to find a manual about WishList Members. That plugin is huge, with a lot of settings…