Have you already figured it out?
If not, search for this NVDA WEB PATCHER script or here on this site... it is the most practical and easy way to do it.
I do not think ads, pops and pubs support the forum
rather, I believe that administrators have to pay to remove Pubs for
Members and for guests. in principle these are two options that offers itself
It would be nice if he was remove for the Members
On my forum is how it works, here maybe it's different