So I've dabbled with the promotion feature directly from YouTube a little and I gained some views but not really many subs. One video I featured got up to 6k views but 1 or 2 Subs, this cost me around 100 bucks to run this campaign. I'm wondering has anyone found success using this feature? If so on average how much did it cost for the whole campaign and was it worth it? I'm not really a fan of spamming my videos in random forums and websites so the idea of just running an ad campaign seems up my alley.