OK. I figured out what the problem is. It does work, however, I had to put the
{module_webappscustomer id="25235" filter="a" collection="someID" template=""} above anything that you want to render json for. I had this module at the bottom of my page, and the form was above. Once I moved the {module_webappscustomer id="25235" filter="a" collection="someID" template=""} to the very top of my page/code above the form, the json data was available to anything below it including the form.
This can be tested easily by placing the <pre>{{this | json}}</pre> at the top of the page and having any module that you want json data for below it. It will not show the data. But id you place the <pre>{{this | json}}</pre> at the very bottom of the page, below all modules, the json data becomes available. After looking at the documentation I see that the examples show to put the <pre>{{this | json}}</pre> at the bottom of the page to see what data is available.