I'm not a paying member yet. The ads though annoying haven't kept the site from being usable for me. There have at times been an ad that for some reason forces my browser to scroll back to it. When that happens I just click the X to remove the ad and it fixes itself. Also, there are plenty of times that I try to click on a particular post and an ad resizes or resets something at the very instant I click and I wind up clicking the wrong thing. But not so much that I feel it not much more than a small price to pay for using the site for free.
I have on the other hand also had issues with Safari on many sites that I commonly use. I much prefer Chrome on my macbook pro, though Chrome has issues sometimes too.