I always want to contribute something to the community, and I think open source is really cool. As an individual developer, I also hope to gain some attention by open-sourcing my own work.

Perhaps you can open source some side library that you created to use in your project.

> I also hope to gain some attention by open-sourcing my own work.

In the worse case, nobody will notice them. In the best case AWS will host it (and not pay you, because the licence says they can do that.)