Most of you are aware of the free HG potential right now with HG diving disabled, but for those who aren't, this post is for you. Currently HG is still available but diving to HG matches is not, what this means is that if you have HG up, you cannot be invaded. What that means is you can play the game normally, gather loot and acquire a "faction hoard", get that thing to level 5 and turn in for a quarter level of allegiance. It's not particularly quick, but it is consistent and basically free since you likely won't have to fight for it. When I heard HG diving was disabled I assumed I'd be seeing more HG "defenders" sailing around, but I'm not. For those who are just in it for the allegiance (or others), take advantage of this opportunity. You can see what your faction hoard is by looking at HG while HG is active. You could still be attacked by other HG players, but if someone out there has HG up and is wanting to attack you, they'd probably do it anyway regardless of HG.
There's no reason not to be playing with HG active. Also keep in mind that emissary's only give a boost to gold when turning in HG streaks and/or hoards, so if you really want to be incognito out there, don't raise an emissary. You're only visible on the map as an HG active player when you have a 4 streak.