@Thadeu Lima de Souza Cascardo That's an interesting point, and it is important to think about how we communicate things affects how people weigh things in their minds.

However, when I hear "copyleft means giving back", I don't just think "give back upstream to the project", I hear "copyleft means giving back to the community", and I feel the latter is strong (not to mention it gathers both upstream and downstream into the conversation).