How exactly does having you move your BTSX encourage voting?[/li][/list]
As long as you don't move your stake you cannot change your votes!
What exactly is 'pruning the blockchain', and how is it beneficial?[/li][/list]
Pruning means that everthing older than 365 days will be auto-moved to the fron
of the block so that the client can remove blocks older than 365 days .. thus
reducing the size of the blockchain.
Does the client give you a warning a while before you need to move your BTSX?[/li][/list]
Currently not .. but we are still 11 months away from that .. maybe the devs
will implement sth like this in time.