Am I sinful if those for whom I published my montages—which I prepared using cracked software and donated their value—profited financially from them, and is it permissible for them to benefit from that money?

We explained how to free oneself from the sin of using pirated software in Fatwa no. 154799. There is no sin in benefiting from montages or other works that used such programs, and no sin accrues to others for using them.