But this really only works if it's ok to get data that is a little out of date - which isn't the case for BrainKing. You certainly don't want to go to a particular game and get the position after the penultimate move. So you want your slaves to be "close", which either means decidated high-speed lines (unlikely to be affordable for BrainKing), or having the slaves on-site. But, if it's the Internet that is the problem, having slaves on-site isn't going to solve anything.

I work for a company that makes its business on the web as well. We're much bigger than BrainKing. The only way we can deal with the massive amount of traffic is to make use of hundreds of database slaves. But they are all on-site. The network has never been a bottleneck - the database is.