The ads bring in money. I'd rather give TDC money by clicking ads than actually sending money I'd prefer it if ads were something that you could disable by donating.
They're not bad either. I wish they were posted a bit higher. I like some of the Google ads relevant to making/playing games. It's got better stuff than the links page.
Disclaimer: Any sarcasm in my posts will not be mentioned as that would ruin the purpose. It is assumed that the reader is intelligent enough to tell the difference between what is sarcasm and what is not.
Depends on what kind of ad. Here's an attempt to sort different kind of ads from how obnoxious they are, from least to most.
-Static or lightly animated banner ads
-Heavily animated banner ads
-Flashbased ads (visually they are no more annoying than a regular ad, BUT they consume more computer resources)
-Pop up ads/flashbased ads with sound (when browsing in several tabs there's nothing more annoying than hearing a sound and not knowing which tab caused it)
- Ok, you must admit that was the most creative cussing this site have ever seen -