So allow me to answer some of these questions for you:
If I want to make a website with more than two pages and publish it to webflow.io, what do I have to do?
You would simply have to upgrade your account plan.
Are you saying I can get a Webflow template (free or paid) and with that I can publish as many pages as the template contains even under the free account?
Yes but if you delete any pages from that project, you won’t be able to get it back. It’s definitely a workaround to getting the paid plan, but you’d still only be able to have 2 sites on the free plan.
If I understand correctly, I can get a light (or pro) account and also have more than two pages on a webflow.io site. Is that right? In that case, is the hosting also free? Or paid? And how many of these sites could I have?
Yes, you can have more than two pages on your projects if you upgrade your account plan. The hosting isn’t free if you upgrade your account plan because the site plans and the account plans are two separate things. Without a site plan, your site isn’t hosted and can’t have a custom domain (yoursite.com).
With the lite plan it looks like I work on up to 10 sites at a time, but once the customer pays for a site plan that frees up space for another. Correct?
That is correct, once your client pays for a site plan, then that does mean you have another free slot for a staging site.
Finally, it seems that if I want to use a client’s own domain for a site on Webflow’s servers, then I/they have to buy a site plan and that now allows me to manage the site, but if I want to give them an administrator dashboard I would have to go Pro account. Is that correct?
You don’t have to pay for a site plan to allow the client to go in and use the Editor and test it out before they plan, but as I said earlier they would need to pay for a site plan to get a custom domain. Also, the Pro account allows you to white label Webflow’s editor and the invoices you send to your customer.
Here is a video by @Ran_Segall that explains a little more in-depth What Webflow Plan is right for you? - YouTube
and some videos video by @PixelGeek aka Nelson about the limitations of Webflow A list of lesser known Webflow limitations (2021) - YouTube and a video on starting out your business on Webflow Using Webflow for free on client projects - Webflow Basics - YouTube
Let me know if you have anymore questions.