I read in a blog post about promotion that when promoting your small YouTube channel "you should offer links to blogs which might want to show off your content". Is that a common practice today when promoting a YouTube channel? I have a feeling the reaction of the majority of blogs would be negative asking you not to spam anymore. Could an insightful and sort-of of humble letter escorting that link compensate for the "temerity" of sending - nevertheless - a spam email? Does anyone have any experience with that?