At the moment we don't support directly hiding projects while allowing participation, but there is a workaround we can use:
create an in-platform survey with access rights "none" so it's open to all
Create a folder and add the project in it.
keep the folder on "draft" but put the project on "publish" so participation is open
Share the URL of the project to the people
Since the folder is on "draft", the project in it will not appear on the homepage. Therefore you will only be able to know it exists if you have the URL link directly to it. Since the access rights of the project is "none", we have now created a situation where only those with a link has access to participate to a project without registration.
Warning 🚨 to take into consideration
1. if you know the title of the project you can still find it in the search project function on the platform
2. Do not add any area tags/ topic tags to the project or residents that follow these tags will recieve email notification that a "new project was published"
3. events associated to this project will show up in the events page
4. users will be able to submit as many survey answers as they wish.