Edit: Ser nu efteråt att det kan gälla andra program på sidan. De har inte bara audio editing programmet utan flera andra.
http://www.aviary.com/faqDoes Aviary have any rights in the works I create?
You own the full rights to all works you create. Aviary only retains a license to display any works you make viewable to the public within Aviary and in any external publication provided it's in a way that promotes Aviary. For example, this means your work may be used to accompany a third-party newspaper article about Aviary.
Is it true that Aviary is completely free?
Yes!
Can I use Aviary for commercial purposes?
Yes. Please note that the use of certain content (such as the audio library provided in Myna) may have certain separate restrictions on being used for commercial purposes. However the tools themselves and any content you yourself create are totally fine for commercial purposes.