It is nice where possible and can help locally, but on scale it will not force through any changes. To see why, we only need to consider the historical material conditions that allowed the development of the current capitalist form in the first place. Small businesses where defeated by capitalists that could employ tactics the others couldn't answer.
In order to answer to the consequences of our current mode of production, we have to force changes to how production is carried out. Saying we want our products locally, ethically and environmentally made will only change their branding, not the fundamental exploitation in search of surplus value.
Did not know about this site. It was a nice read and their mission statement is cool. Thanks for sharing! :)