Facebook, Twitter, Instagram and even Snapchat seem to be the hot ticket for social promotions these days, but don’t forget that Tumblr still has a strong user base. If your target demographic uses Tumblr, and you consider running a contest or sweepstakes, make sure to keep the Tumblr Contest Guidelines on your radar. The guidelines follow many of the same parameters as other social platforms do. Namely, that Tumblr