i purchased 3 codes and notice after applying them all a message that says

3 of 5 AppSumo codes redeemed. Redeem 5 codes to unlock Business Plan features.

so with the business plan features scheduler, Gantt chart and a client portal? billing as well
i assume more users and more disk space to go along.

i just started using it today with 2 team members so far, we are a small team of less than 10