Of course, for doing business with businessmen you have to lie business. Just like Krishna Himself, the Supreme Personality of Godhead, sometimes He also had to also fabricate something in emergency situations. Although He made promise not to interfere in the Battle of Kuruksetra, He was forced to break His promise just to save His pure devotee. So there is no prohibition one shall never tell lie, because for business of carrying our propaganda work sometimes it may be necessary. Krishna Consciousness means practical living, not something utopian or idealistic and vague. We simply do the needful, whatever pleases Krishna most, that's all.
Letter to Yajnesvara, January 2, 1972