Last month, Shopify launched their Shopify Audience Network to a segment of their customers.
While the concept makes sense (kind of, targeting e-commerce buyers is a good thing), it does create a bit of murkiness in terms of those who participate in the network.
Do you really want competitors re-targeting your buyers?
While concepts like this rely on a large amount of data for it to be useful, it might still be early before any customer sees return on it.
Anyone have results so far?