Comment by bick_nyers

This is an amazing idea and I would only buy a product that has this stamp on them. I would put some additional triggers into the publication of source code as well, notably if the company goes out of business. I would also put some kind of timer and renewal process on it, like a company needs to recertify every 1-5 years (pros and cons to different time lengths) and that they have indeed been providing actual updates (and not just fake ones) and actual support.