My assumption is that in-game rep values are just representations of your standing on the various social networks, which in practice are an amalgam of actual rep score, reviews from other users on the network and various other metrics which would typically be collated by a muse. So what someone sees is "his c-rep profile is in the 60th percentile of reputation scores and plastered in glowing reviews." It would be a little convenient that every disparate social network standardised on the same 0-99 scale or works the same way. My take on it is that each network has its own rating system. The Eye uses some pseudo-"objective" percentile system, while c-rep uses stars and @-rep uses a non-ranking, cumulative system where you "raise flags" for other users, etcetera.