Why are there ads on this site?
Because I don't sell any goods or services from this site, I need a way to "keep the lights on", so to speak. The advertising is here to help pay for site hosting and maintenance (and it barely covers that).
The ads are not customized to target you personally, and they are placed at the bottom of the page rather than in the middle of what you're reading, in order to keep them non-intrusive. Thanks for your understanding!