according to this link:
https://blogs.technet.microsoft.com/stbnewsbytes/2015/08/19/cloud-platform-release-announcements-for-august-19-2015/
Power BI Pro should be free for MSDN users. My account has an MSDN subscription but when I try to activate it from my subscription page, I am given an error page
Sorry, we can’t finish signing you up
The service you’re subscribing to isn’t available for one of the following reasons:
- It’s no longer offered by Microsoft.
- You’ve already tried this service. You can sign up for a trial only once.
- The beta or trial you’re requesting has expired.
- The promotion code has already been used.
For more information, contact the Microsoft partner that gave you the link to this offer.