Here's an analogy [edited out the term allegory due to switching away from the origional narritive prose I intended when making this post] of player base using common household objects...
The player base in AH is like a pot of boiling water, with players being represented by individual molecules and player skill being represented by their respective molecule's energy state. The burner (that painful addiction we all feel glowing hot beneath us) is constantly increasing the energy state of the pot. The longer you stick around the higher your energy state will likely be. Many skilled players constantly leave as their energy state gets high enough to permit them to break free of the attractive hydrogen bond forces, but some terribly skilled players continue to bounce around inside the pot despite having a significantly higher then average amount of kinetic energy. If you fail to add new water every once in a while too much will have boiled off and the probability that even the talented and addicted players will shoot off in evaporation will increase. Adding too many new players will lower the energy level of the entier pot, yes, and frequent collisions with low energy particles will drag down the high skill level of those few super players. However, once that skill level is a little lower, they arn't nearly as likely to leave in evaporation. The addictive power of AH (the burner) will be greater as a direct result of the lower average skill level. There's always the DA when things get too bad.
-pellik