Add Birchbox to the list of startups -- including Square -- that have turned to traditional TV advertising as they look to drive mass adoption of their services.Birchbox was the biggest name in a passel of subscription commerce startups at the turn of the decade, offering beauty samples for women and later a version for men. It generates revenue through subscription fees and product sales of full-sized items available on its own site, as well as from a handful of advertisers like USA Network's "Suits" who have paid to brand the boxes.The company reports more than 800,000 subscribers and has...