Affero GPL might be ideal for you. It means that both network and local users of an app get the source code. So, maybe someone out-markets you, but the users st

Affero GPL might be ideal for you. It means that both network and local users of an app get the source code. So, maybe someone out-markets you, but the users still must get the source. But you won't necessarily get attribution if that's what you're after (CC is good for that).