> Permission is hereby granted, *free of charge*, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software *without restriction*, including *without limitation* the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software
Emphasis mine.
I'm not a lawyer, but are you sure your words can contradict another right you specifically gave with that license?
That's why you use dual licensing; if you clearly state that you want the software to use MIT without money involved but something else if money is involved that is generally not a problem, never has been, and never will be: because it makes sense, it's fair and honest!
You want a MIT license (that is by definition without restrictions), but you want to add the "without money restriction". It doesn't work like that. Once you add a restriction of "without money involved" to the MIT license, it is not the MIT license anymore.
Emphasis mine.
I'm not a lawyer, but are you sure your words can contradict another right you specifically gave with that license?