Hello @anon76280028,
maybe sharing a read-only link works.
Currently, I am not aware of any project permission that would not allow people to also not comment.
I have also found this post about enterprise subscriptions and a beta test regarding view-only permission.
Now for read-only links here is an interesting feedback request thread.
Now in your case I am not sure who the people are you’d like to add but this post might be relevant as well and give you some ideas.