Unlimited "view" guests are great.
However, Clickup allows for a limited number of guests for which permissions can be applied. Those guests can be given permission to update fields. Clickup's guest permission capabilities are a good example: https://help.clickup.com/hc/en-us/articles/6310022323991-Guests-overview
I would love to see the addition of a limited number of "Permission Guests" for each plan. This would be an adoption accelerant.