You can perfectly use the service for free. That’s what I’ve done over the last few years.

It will provide you enough data and you can still upgrade if you need some history.

My personal setup is:

• Wordpress Blog where the MP4 files are stored
• The podcast submitted on iTunes
• The Wordpress extension of Blubbry plugged on it

But you can use it without a blog with your soundcloud feed.

Indeed the service discovery is very limited.