Even if sometimes staff members look on this forum and post from time to time, the help on this forum is mostly provided by people who are doing this as a volunteer. You can contact Mathworks support directly with the 'Contact Us' button at the bottom of the page. (I don't work for Mathworks, so if you want an official answer you will have to contact them directly)
But I expect the answer to be no. You can publish your toolbox for free on the FileExchange, but I'm not aware of any system that would allow you to monetize your submission that way.
What you can do (if your Matlab license allows it) is to make a toolbox file and sell it on your own website. That would require your users to install your toolbox themselves.
