Hey I have a fairly successful WordPress site in which I charge a one-time fee for full access. I'd like to incorporate a forum in which I charge a monthly or yearly fee for. I'd like it so that they could still use their same username and password. However I want to make sure that the access is cut off once they stop paying.
I am aware of WordPress forum software. However I want to make sure that their access to the forum is solely dependant on whether or not they are active paying members.
Does anyone have experience in this type of thing?