I haven't for a while unfortunately. I have gotten a couple of good deals in the past though. I think when I first joined PS+, it was on special for something like R360 for 12 months. And last time I renewed, it was full price, but they threw in an extra 3 months or something if I recall correctly.
Keep an eye on https://store.sonyentertainmentnetwork.com and a couple of 3rd party codes sites like Evopoints, Cheapcodes and PrepaidGamer.
The Final Fantasy XIV PS4 open beta is now on the store:
https://store.sonyentertainmentnetwo...00000000000951
Not sure what the size is though.