I would if I used it a lot.. Extensive ads ruin a lot of webpages to the extend that I just stay away..

Yes, I know I could use adblock etc., which helps, but the design and layout is still much worse than it could be. It's worth paying a small amount to fix sites I use a lot.

Also, it's the principle of the thing. If they can't see that their site is totally f#¤ useless and ugly, I'm not going to bother with them.