I think polls can be useful indicators for the likelihood of success of a ballot measure (e.g. banning intensive confinement, like some US states have), but they have to be framed concretely and with enough context to emphasize the costs to consumers. Also, people have voted to ban cages and crates despite it increasing their costs and not already really buying cage-free or crate-free. See this for some discussion:
https://jaysonlusk.com/blog/2019/2/18/why-dont-we-vote-like-we-shop
I think polls can be useful indicators for the likelihood of success of a ballot measure (e.g. banning intensive confinement, like some US states have), but they have to be framed concretely and with enough context to emphasize the costs to consumers. Also, people have voted to ban cages and crates despite it increasing their costs and not already really buying cage-free or crate-free. See this for some discussion: https://jaysonlusk.com/blog/2019/2/18/why-dont-we-vote-like-we-shop