With the 150$ monthly credit from a MSDN-Enterprise-subscription you'll get around 8kH/s mining Monero, which will net you (at the time of writing) around 15$ in crypto-currency per Month.
I like to view this as my retirement fund. I'm doing this long-term, so even a little amount will accumulate to a sizable sum after some time. Also, i expect the exchange-rate for crypto to be _way_ higher by the time i retire...