The download of the application is covered in the 25MB. So, if an application is 1.98MB and you haven't used your 25MB allowance that month, you will not be charged for those MB.
The cost of the application, however, is NOT covered. You will still have to pay the one-time fee or monthly subscription to use the application.
You should fill out the survey, especially if you use the name/badge # of the person you talked to, it will get back to them.