Well, I also was torn in that I am still not even half way through the savage tide, got less than halfway through the age of worms, have a subscription to pathfinder and still have World's Largest Dungeon that the group has been clamoring for again (we got through 2 and a half sections before TPK). However, I am of the opinion that I'll try out anything that paizo is putting out right now to help support them. Plus, the more information on the paizo world, the better...
And if, a few months from now, I feel like it is wasted money, I'll just drop the subscription.
My only concern is that they are selling the subscription at cover price, which means, after shipping I am paying more to buy it from them than I would be supporting my LGS (although you do get the pdf for free, which is cool).