As far as i know, all the unshared bounty tokens will be considered as the same of the unsold tokens. I believe they would burned up all those tokens after they finish distributing them, that way also a way to prevent the price from falling.
Again, that should be the right thing to do if the dev team is honest, burning spare tokens in order to lessen the supplies. From that point,
the volume will be much lesser. Chances for the value to rise follows if the team will succeed. In order to gain more trust and supports, the investors should be aware of these kind of reports.
Any spare tokens, though still in the hands of developers, they have all the capabilities whatever they like to do with it.