First of all from a consumer standpoint it seems like people are getting something for nothing (cross buy) or for very little (PS+). However, when you look at the genius of Sony anyone who takes advantage of these great deals for their Vita are likely spending a lot more money than they expected too. Why? Memory Cards of course, the numerous free games take up some serious space on the vita so for people who do not want to delete and reinstall games all the time, new memory cards are a must buy. If the memory cards are like most system accesories then they provide a major profit margain for Sony.
I have personally boughten 2 new memory cards since I got my Vita just for PS+ games and cross play/ cross buy games. I will likely be a 32 gb when I find it under $75.
I have also found myself my more willing to invest in DLC for the free games I get from PS+.
I am a very happy customer even though I am spending a lot more money for the service than initally expected anyone have a similar experience or thought.