I think it's called Stripe Express, but I could be wrong. In your creator dashboard settings, you should be able to find it close to where the PayPal setup was. Here's an image for you to show you what it looks like once you have it setup.
I think its pretty fast to setup from what I can remember.
Yeah, for example, if I wanted to go through and download from your asset lines, it would take a while because I would have to rely on online extraction. I think Mac users can buy programs for RAR extraction, but most programs are not 100% free, whereas ZIP is 100% free and is automatically included on everyone's Mac.