By promotional I think we're talking about "selling a product", so when I write a post like this say: http://blog.intercom.io/retention-cohorts-and-visualisatio

By promotional I think we're talking about "selling a product", so when I write a post like this say: http://blog.intercom.io/retention-cohorts-and-visualisations/ http://blog.intercom.io/retention-cohorts-and-visualisations... there is no "Buy now" proposition, it's just me explaining something that I've invested considerable time into researching. I think everyone wins when this happens.