These days I ignore the ads, since I
don't see why I should give money well as time: and they are obviously
aimed at Wikipedia's readers, who outnumber the people seriously
involved with the site by a factor of 10,000 or more by now.
I share the same feeling. As an editor, I think I contribute to
Wikipedia sufficiently so as not to feel bad for not donating. The
thing is that I would love to donate, but the endless heckling from
deletionists have left a bad enough aftertaste that I won't donate
anything more than my edits.