What is the benefit? I don't really know. For me, just personal satisfaction and more Oracle knowledge :-) I would like to know as much as possibe about HA in Oracle: OPS, RAC, Standby, Advanced Replication, etc. This is what I work with everyday.

Nobody at work even knows about Oracle Master. In fact only a couple of people do really understand what OCP is. Just trying to be one step ahead :-)