The framework as officially described involves a gift to the U.S. government plus a processing fee. Amounts and refund terms are published by the program and have been subject to change, so confirm both on the official page before committing.
Confirm the amount and the refund position together
Hypothetical example: a Grand Bay-Westfield applicant reads a figure in a news article and starts arranging finance around it. Two things need confirming and they are separate questions. The first is the current amount of the gift and the processing fee, which should be taken from the official program page on the day the decision is made rather than from a report written earlier.
The second is what happens if the application does not succeed: whether any part is returned, at which stage, and on what conditions. Get that in writing. Then add the costs that sit outside the framework entirely, including Canadian tax on any disposal used to fund the payment and professional fees for advice, and treat a gift as money that will not come back unless the official terms say otherwise.