Yup, you get to wait a year from when it's aired for subscribers.
With many people cutting the cord, subscribing to HBO isn't an option, thankfully it looks like they are open to the idea of allowing a digital only subscription to access HBO-Go.
Your options are currently:
1) Subscribe to cable and HBO and watch on Live TV, HBO OnDemand, DVR, or online via HBO-Go
2) Wait a year for the Blu-Ray and DVD boxset
3) Click the torrent for the new episode posted 5-10 minutes after it finishes airing, and wait 10-15 minutes for the download and play it on any hardware you have.
It might not be legit, but you aren't really giving the consumer choices, having it available on Amazon Instant Video where you purchase each episode or the full season and have a one to two week delay would be reasonable. But waiting for a whole year when illegal option is available all that time?
This same practice hurt the movie industry where a movie would come out and then be available in its country of origin on DVD before it heads across the global for release in theaters. Or PC games released 8 months later due to translation/localization. What happens when the global release is within a few weeks of one another? There is less piracy as people can get their fix.