That tournament started less than ten months after the website started, and less than one month after I joined.
At first, it was a struggle for me to get my rating over 1300, but I managed to get it over 1400 a few months after the tourney started. In other words, I was a player of similar strength to the others who were entering the tournament at the time. I managed to win a few games, and by July (5 months into the tourney), a few timeout wins had lifted my rating to an all-time high of 1566. With a few exceptions, I was able to keep my rating above 1500 after that. I've had some help from timeout wins (perhaps several of the people on the list you posted have had similar help). My "Best Win" was by timeout in a position that was losing for me, and was one of the three wins I scored in Round 3 of the tournament.
If you're really bothered by the increase in skill and ratings that happens in a tournament this long, you can always join a smaller tournament that takes less time.
MM78 wrote: "It started over a year ago and with over 1400 players, you are complaining that less than 1% are now very highly rated."
Vance917 wrote: "Are you trying to tell me that all of these players joined just before this tournament began? And wait, that's not all. They also have so little experience with chess as to not realize that they have no business in a tournament whose entry is defined by such a rating range? No, I think I will have to stick with the sandbagging explanation as the only one that makes any sense whatsoever."
Vance, what percentage of people in the tournament would you think would be new to the site? I don't find it odd that some people who entered were new players with high strengths. When did the tournament start? There are only 11 players there, seems like you don't need to do too much detective work to figure out what was going on.