Mr. Fairbarn-
The reason to have an "online only rating" is because for large swathes of the central US region, commuting to tournaments is just not an option. There are any number of people who see no value in an AGA membership because they see the top benefit of membership as being the ability to play in tournaments. Now, if you can have tournaments held across sites (e.g., 5 in this coffeeshop, 10 at this local club, another few in a library, etc), then you might see a lot more interest.
Secondly, i'd like to think that having a real, honest to god person associated with an online handle can help address a lot of the problems in online go. people playing with free pseudonymous accounts will have no problem escaping, making a new one, escaping, making a new one, etc.
Thirdly, i'd like to point out that ranks have consequences. It sucks when you've improved, your rank hasn't changed, and you get nothing but easy games at tournaments. It's just as bad when it's the other way 'round. Let's not forget the point of ranks, which is especially useful for us duffers -- so that we can play games that are challenging for both players.
But this is not what I asked about nor does it relate to the point I was making.
There are ranks/grades (2-dan etc) and ratings (2345). I'm asking members why they make so much fuss about (I think) spuriously accurate ratings. Take away the fuss about that and the work on the AGA project becomes much simpler. You can have online ranks more easily than online ratings and at amateur level ranks are just as meaningful as ratings. KGS uses online ranks. UK meat-space tournaments use ranks. Possibly I've misunderstood and your system does after all also use ranks rather than ratings, but I've seen people talk about 1.95 dan, etc so the impulse to seek spurious precision is still there. Yet again, why? I understand the wish/need to have a rank. I don't understand, among people whose go strengths vary enormously from day to day through reasons nothing to do with go, the wish/need to have a rating, especially when it evidently involves so much effort by already hard-pressed administrators (which is why I think it belongs in this thread).