One of the reasons I became a paid member was to reduce the number of ads so I'm all in favour. I find them very distracting on several other forums where they aren't restricted.
One advert per thread isn't too bad. It's when there are multiple ads that it gets very distracting.
Also, nothing to do with the forum, I'm used to ads targeting things I've viewed or purchased elsewhere. But recently, there has been more than one case where ads have popped up for items my wife has purchased on her pc.
That really should never happen in terms of data protection and tracking.