While these mass-produced forms of teaching have obvious economic payoffs for a few people, they have many shortcomings when compared with a chain reaction approach in which one person supports a handful of others, either individually or in a small group. A chain reaction that includes an ongoing support structure will cause a greater amount of learning. Chain reactions are relatively inexpensive since very little infrastructure is needed. In other words, you don't need to pay for buildings, mass advertising, or for building a large distribution network. Because little infrastructure is needed, chain reactions are easily translated into other cultures, languages, and can help people with little resources.
Chain reactions can rapidly grow.
Chain reactions do have some disadvantages, and that is why they are not as common as mass-produced learning situations. At the beginning they grow more slowly than mass-produced learning. And initial small numbers may seem like failure to many people used to mass-produced learning. There is always the danger of message dilution if standards are not maintained. By the time the learning reaches person G or person T, much of it may have been lost or distorted.