Service Pricing Question

Hi Pete,

I'm a doctor looking to tackle the problem of physician burnout and address the problem with the increasing suicide rate amongst physicians.  Obviously my main goal is to touch these people's lives over making money.  However, as I develop my product, would it be possible to unlock the product for free and make an ask for a donation at the discretion of the customer?  Have any of your speakers used that model?  If so, did people actually donate, and to what level?  Thanks for the info!

Mark