
Creative Commons has developed a new contract for the CC license, so that the authors of the “free” works will finally have the opportunity to earn money from the commercial distribution of their works. The new system (i.e., the CC license plus the new contract) is called
CC + (CCPlus).
If the author publishes his work under the sign of CC +, then he thereby allows anyone to use it for commercial purposes, while the author receives a predetermined percentage of future profits or payment at a fixed rate.
Thus, CC + is a combination of a free CC license and a standard commercial contract. Even if the work is published under the usual CC license, if commercial publishers are interested, you can quickly transfer it to CC +.