In 1929, the SA added a Motor Corps for better mobility and a faster mustering of units.[13] It also acquired an independent source of funds: royalties from its own Sturm Cigarette Company. Previously, the SA had been financially dependent on the party leadership, as it charged no membership fees;[14][15] the SA recruited particularly among the many unemployed in the economic crisis.[16] The SA used violence against shops and shopkeepers stocking competing cigarette brands; it also punished any SA member caught with non-Sturm cigarettes.[14][15] Sturm marketing was also used to make military service more appealing. Cigarettes were sold with collectible sets of images of historical German army uniforms.[4]