If so, we most certainly welcome you to do so and are glad they fit your needs, but group use requires the additional, add-on purchase of a one-time Professional & Group License Fee.
Not sure if you are required to pay the licensing fee? Basically, if you will be making copies for more people than just yourself or use in your own home, then you qualify for the group license. This applies whether you're using just one set or the entire collection.
(For gift-giving, a group license is NOT required, but please purchase one set per gift, just as if you were buying a physical product. However, if you plan to give five sets or more - either now or years down the road - it works out to be cheaper if you purchase a group license, which gives you lifetime unlimited copies to share.)
Your license will be e-mailed to you immediately after purchase.