Very interesting approach and initiative. Some thoughts....to get the brand's attention showcase your initiative you are doing here on Steemit on the other 'mainstream' social channels such as FB and Twitter but for big brands I also recommend linkedin (these channels are where their social media managers/marketing people are still hanging out and you need to pull them in). It would come very natural to @ mention the brand you are showcasing on the social channels but I think it's even better to mention a competing brand. Why? Brands are all the time monitoring each other and mirroring or getting ideas from what the other is doing. I find that some marketing people take decisions based on what the competing brand is doing. So if a competing brand of Levi is seeing this, they would say "oh that's a good innovative channel that our competition is hopping on to. We need to get there too!"