We are using Akeeba Subscriptions to run our business at Galaxiis.com, unfortunately the support has ended and for good reasons (read more here and Here)

Use at you own risk.

No support will be provided, it is not our code.

Remember it is a developer tool.

Thanks to Akeeba for having developed such an extension!

How to build yourself

Some easy to use build scripts have been written, get them at 

https://gist.github.com/cedricwalter/98a936e3542751169c24ee3f2a821915 
and
https://gist.github.com/cedricwalter/07d7dccad53d457c581ae42beb36dfe6