But then you could just download a 300 GB cache, and then just quit paying... Oh wait, its free, never mind.

Seriously, I have never gotten an answer about the cache size, but I am suspicious that there are performance issues. maybe some internal program aspect that is just hard to upgrade.

I became interested when I was giving club presentations at places with (gasp!) no broadband connection. Most of those places have been abandoned, or connected, so I somewhat lost interest.