Question on the Pro Plan?

If I purchase the Pro Plan, does that mean I get to make unlimited sites with unlimited hosting? Or do I have to pay for the hosting when connecting a custom domain because each site will not have the url Webflow link on the end.

You still have to pay for hosting on sites with custom domains. It means you can have unlimited non hosted sites in your dashboard where the other plans have a limit. If you are on the lower plans, hosted sites that you have custom domains for do not count towards your sites in dashboard limit. Hope that helps.