Creation of promotional and marketing strategies and campaigns for others; managing the implementation of promotional and marketing campaigns for others; promoting and marketing the goods and services of others by displaying advertising materials of others at sporting events, concerts, trade shows, exhibitions and other large public gatherings; promoting and marketing the goods and services of others through stealth marketing, namely, promoting the goods and services of others through marketing campaigns wherein the target consumers do not realize that they are the subject of a marketing effort and ambush marketing, namely, by creating a perception in the eyes of attendees to a sponsored event of a connection to said event of a non-sponsoring competitor of the sponser