xOR, you cannot rank servers so easily. What they do for TF2 is to score servers and to delist the really bad ones, but they don't rank them. A server with a higher score is not necessarily better than a server with lower score. Think about CS 1.6, a 32 slots server (which according to current algorithm will have a high score) is better than a decent 16-20 slots server (which will score lower)? A lot of players will say no...
ps1: you can open a MOTD window for HL1 mods whenever you want for which player you want using
show_motd AmxModX function, but you cannot use Steam URLs, they fixed this long time ago
ps2: every software has bugs, the one described in your screenshot was fixed since April/May 2009 updates