I must be having a brain fart.
I'm trying to figure out how to do this but coming up blank - if anyone can start the thought process for me, it would be appreciated
Site A is a membership site.
Site B is a membership site.
People can obviously join them independently.
What I'd *like* to do - is give members of site A a reduced price for site B, IF they join site B from inside the members' area of site A.
BUT I don't want them to be able to remain a member of site B at the reduced price if they let their membership to site A lapse. In other words, if they cancel site A - then their reduced price membership at site B would also be cancelled.
Anyone have any thoughts (other than slapping me on the side of the head - I've already tried that one and it isn't working

)