"Most of the competition was into bulk popcorn because of the major increases in the Drive-In Theatre Outlets"

This quote by Orville Redenbacher is referring to the competitors in the popcorn market. At the time, many companies were concentrating on producing bulk popcorn due to the rise in popularity of drive-in theatres. Drive-in theatres were becoming progressively popular, and as an outcome, the need for popcorn was increasing. Business were attempting to capitalize on this trend by producing big quantities of popcorn to meet the demand. Redenbacher was likely referring to this trend and how it was affecting the competition in the popcorn market. He was most likely keeping in mind that many companies were focusing on producing bulk popcorn to fulfill the need of drive-in theatres, and that this was having a result on the competitors.