I am the author of a marketplace for markets entirely built on bubble that has been fully functionnal for several monthes already (https://marcheco.fr/).
In short, the marketplace includes most of the features that a marketplace like airbnb has (search, registration, payments, sms, emails, internal messaging, notifications, comments, profiles, etc.)
I am starting to release some parts of it as paid templates, so that people can gain time building their own marketplace and have access to something that is fully working in production.
For a starting, I just released a template covering only our help center, which you can see live here: https://marcheco.fr/help
The template itself is available here: https://bubble.io/template/help-center-1527512895209x932729117561585700
Some more parts are coming, and maybe I could prioritize by what the community wants.
I thought about releasing the whole website as a template, but there are sooooo many functionnalities that I am afraid this would be a mess and quite hard for people to fully understand.
My aim is to mainly provide functionnal parts, and not some kind of rip-off of well known websites. I think that Bubble allows us to easily make beautiful websites, but that some specific features can be hard to achieve. So I see templates more as learning material.
Are there any part of the website you would like to see released as templates ?