So here’s how I could imagine a low friction sharing could work:
In the sharing settings for a space, there is an option called ‘invite someone into this space’ with a box where you can type in the email address of someone you want to share the space with. After you have typed it in, and clicked the button, an email is sent to that person, which contains a ‘magic link’ (this is a mechanism which allows the recipient to visit a website and automatically be logged in, without requiring them to provide a user name or password).
Once they click the link, they can look around, and do all the things that a logged in guest can do (and in the background, a guest account has in fact been created for them).
Typically, if they try to use the magic link after a certain time has elapsed, or re-use it, then they are not immediately allowed in, but can be invited to request a new ‘magic link’ via which they reconfirm their identity.
It’s how medium.com does logins, and doesn’t require creating a password or anything, but the user is uniquely identifiable when doing anything on the site.
If some visitors are regulars, once they’re in, they can be offered the option to create a password, so that they don’t need to use the magic link mechanism going forward.
Overall, this is much different from simply distributing a space share url via which any person can visit the site. Such a ‘sharing url’ allows anonymous access, which can be an advantage or a disadvantage.
Advantage: the url can be shared with colleagues so that anyone with the link can see what’s happening within the space
Disadvantage: anyone (good or bad) who knows the link can see what’s happening in the space, so it relies on security-through-obscurity to ensure that sensitive info does not leak out.
Anyway, if that advantage is important, then a sharing url may be the way to go, and perhaps Fibery should introduce a mechanism to limit public sharing on a per spaces basis - which is your original request I suppose.
But if you actually only want to share with specific people, simply providing Fibery their email addresses and letting it take care of granting them guest accounts with low friction (e.g. with magic links) might be preferable.
I hope this explains why I was asking