Question:

I would like to add a user to my DataCamp organization or team but they already have a paid individual subscription. Can they use that subscription in my group and not take up one of my licenses?

Answer:

Enrolled members cannot pay individually. A DataCamp account can either 1) be enrolled in a group, or 2) have an individual subscription, but not both. 

An account with an active individual subscription that's enrolled in a group will automatically receive a pro-rata refund that covers the remainder of their individual subscription. The individual subscription will also be canceled. Once the group's business subscription ends, that account is eligible again for a new individual subscription.