@StrangeQuark: AR accepts whatever freeware game reviews the members choose to submit. It happens to mostly be AGS games, I suppose due to member preference for (or sheer number of) these games, but we have encouraged people to submit reviews for other types of games. We just don't tend to receive reviews for AGI games very often.
So, basically, the distribution of types of games on AR tends to reflect the community's favorites (the members of the community that submit reviews, that is).
So, feel free to check out the site and submit a review for an AGI game that's not on the site or that we may not know about, if you'd like to help us get more of those types of games