MSDN Magazine is retiring
“After 30 years of providing technical guidance to the community of Microsoft developers, MSDN Magazine will publish its last issue in November. All previous issues will be archived and available online. “
This announcement Microsoft has just made for more details check this article where you you can see details of refund if you are subscriber.
It is worth mentioning that Microsoft will focus more on online resources like https://devblogs.microsoft.com/visualstudio/ and https://docs.microsoft.com/en-us/