Pinterest aside, as far as growth and decline goes this year, the trend that stands out the most this month is around StumbleUpon. StumbleUpon’s share of traffic sent to publisher sites has steadily declined by 53% since July. Additionally, Twitter now outpaces Stumbleupon’s share of traffic by .22%. StumbleUpon recently unveiled a new site design and Pinterest-like “lists” feature which enables content consumers to curate collections of articles they enjoy – but publishers will still have to see if this results in click-throughs and traffic directly to their sites.