The other factor is that it sounds like it's a fairly simple application to run, basically just a plain-text viewer with minimal DRM, which is why it has reached "platinum" status.  Some games have as many as 400 votes.

2009/7/30 Igor Tarasov <tarasov.igor@gmail.com>
2009/7/30 Groeschel, Volker <volker.groeschel@sap.com>:
> This looks like a manipulation for me.
>
> How is this calculated?

This is calculated by the number of votes. Watchtower Library 2008 has
46 votes. 2nd place application - 44.

--
Igor