No, I’m not Webflow staff. Just a designer/developer using Webflow routinely. Webflow as a SAAS isn’t completely closed as you can export the code. It seems to me the pricing is better for Pros and Agencies than individuals.
To address @PixelPanda questions. I think an “unbranded” or white label might happen someday but can’t confirm. Webflow still shows as the generator unless you export and remove. Having a pro-plan and reselling to a client is easy.
Think about it this way… to get a plan with more than two pages, and without the “Made In Webflow” tag at the bottom your client would have to pay $16/month plus the $4.99 for a custom domain (static site) or $20 for custom domain (CMS). This means they would pay $20.99 or $36.99 and not have as many email submissions available and no priority support. So charging the client what it would cost them to have their own plan (I don’t but might start) and keep them under your plan doesn’t seem unrealistic since you are ultimately providing more value. Those prices are still less than the $35 + $5 or $20 that having their own pro plan would costs.