Frogpelt kinda touched this. You can take some creative licenses for example. Feel free to use "that photo" or "that sound" but not for profit. BBC let free their sound library, and you can use any clip you want, except not for profit.
Right, but that's explicit in the license. On the other hand, it's broadly accepted that you can sell stuff that includes BSD-licensed works, despite the BSD license not explicitly saying you can.
