What benefit does an organisation get out by setting up an academy?

What benefit does an organisation get out by setting up an academy?
increase the number of people who are trained to sell, deploy or use the services or products of the companyincrease sales of products indirectly through 1increases the perceived quality of the company's products/services (because trained people use the product/service better and therefore have a better opinion of its quality, recommend it more to others etc.)
have a readily available pool of people that can be hired, usually at reduced training costs (because the academy already trained them many at a time, thus saving money compared to if they were all trained one by one)lastly the company can make some money by selling certifications for graduating the academy (e.g. examination fee)