I thought the top 100 sites were full of shit anyway.
Is that not the case?
Their site is very, very bad but is still used by large groups of non english speaking players who can be hard to reach out to with our traditional advertisement methods. They reset the first of the month so having people vote on the 1st-5th of the month can make sure that the listing is visible (at least on the first page) for the remainder of the month. After that we dont bother with it because its so filled with fake votes and false advertisements.
It is also quite useful from a SEO perspective but you are correct that their site is bad in terms of reliability and functionality.
I can confirm what P4N is saying as well. While the sites suck, they are unreliable, and generally cause a lot of issues, they are essentially the "go to" for a lot of players that are searching for servers, as they create a sort of database of what's available. They're something that aren't really fun to deal with, but they do have value when it comes to getting the word out to a niche market.