There can be no winner.
If they accept online text-based comments, they get trash from birfers and the like.
If video responses, they get trash and criticism of creating an expensive barrier to entry.
If paper comments, they get pre-printed junk and criticism of wasting paper.
A solution is not to go to the masses (where it is the unemployed loons who have all the spare time), but to have a summit to which people (from all areas) are invited. Take away as much of the tribal clumping as possible, and bring it back to raw, individual ideas. That will still cop a lot of criticism (see Rudd's 2020 summit here in Australia), but so will any alternative.