If your posture is to give hoping that you’ll earn the moral high ground and thus get something back, you didn’t give first.
You gave second.
You’re saying, “how can I incur a debt, one that I’m going to use to achieve my goals.”
If the words ‘I’ and ‘my’ appear in your reasoning before you get to the work you’re hoping to contribute, then your goal is reciprocity. Calling it generosity merely confuses the issue.