As an ArrangeMe Pro member, you receive an additional 2% in commissions for ALL titles you publish: Copyrighted songs, Public Domain arrangements, and Original compositions!
Once you upgrade your account, your commission rates become:
12% on sales of Copyrighted arrangements
52% on sales of Public Domain arrangements and Original compositions
These rates are calculated automatically whenever a sale is made and reflected in the "Est. Commissions" column of the Sales Report section of your Dashboard.