If I were to list a dozen behaviours, such as "gives to charity", "moves all income to offshore accounts to save taxes", etc, you would probably be able to sort them into "cooperative" and "selfish".

So those are well-defined categories. That one might just be a detour to the other doesn't seem to be relevant.

And, of course, the problem is that, far too often, fans of economic theory make the opposite mistake, and consider cooperative behaviour as a failure of rationality, when in reality they are just not thinking it through to the end.