The features of your membership plan (the team's admin) will be reflected on the social media accounts you share with team members. It does not matter what type of plan they have. In other words, if a team member is on the free plan, they will have access to the same features that you have with the social media account(s) you share with them. Also, the social media account(s) that you share with them will not count towards their membership plan's social media account limit.