The 1% contribution, how does it actually work?

Yes, exactly that. It's transparent and automatic. Basically it goes toward funding the running of the site. And since it's taken at the source, you have nothing to do on your end.

It's not a silly question at all! Actually no, you don't pay anything. The contribution is taken automatically by the partner bank when the funds arrive in your account. You receive the net amount, that's it. You have nothing to do.

I had the same question before getting started. Concretely you don't spend a single cent out of your own pocket, that's the important thing. It's all handled upfront.

It's actually a smart model. The site stays free for us, and the contribution funds the service. Everyone wins.