You guys underestimate Wikipedia. PS: If your competitor spends all his time guarding Wikipedia links, he will surely be out of business soon, so no worries.
You guys have got to be kidding. Your sites are getting removed because they look like MFA sites (even if they're not). The average internet savvy person can spot a site that was create solely for Adsense a mile away. The design, the ad placement, and just the overall look and feel of not being "authentic" clues people in on whether your site deserves to stay in the article or not. Most of the people complaining on this thread need to look at their sites and think, "is this really a top quality website that's worth people's time to visit?" Most of your sites are not.
Its not about being relevant, wiki rules state its not a web directory. Some articles are there because they have been quoted from or used as basis for writing the wiki articles... sometimes you will get to deal with jealous people though that delete your legit articles just because they dont want your site to benefit from it.