I have a specific question about free-to-use software.
By free-to-use I don't mean Open Source necessarily, nor do I mean Free Software. What I mean is: a software that allows you to use it free of charge, until certain requirements are met. Such requirements could mean: "You may use this software free of charge for 30 days, after that you have to pay for it." Or "If you are an individual, or company consisting of less than 100 employess; you may use this software free of charge."
An example of one such software is Xamarin. Xamarin License Page
I guess "free-to-use" software COULD fall under the category of Open Source or Free Software, or other similar terms, but not necessarily.
I am writing an essay on the subject of tools for developing mobile applications, and I need to ask the following question: "Could somebody please direct me to one (or more) study (studies) arguing advantages and disadvantages of using free-to-use software?"
Note: I am not asking the question here, I am merely explaining my question, so that you can more accurately guide me to where I should ask my question.
So what I need is: where do I go to ask questions related to academic work on the above-mentioned subject? (I also gladly take suggestions on how to improve my question, so that people will understand my specific needs.)