"because software on servers is so easy to replicate, and distribution is inherently word of mouth. " Networking effects are extremely difficult to break. Als

"because software on servers is so easy to replicate, and distribution is inherently word of mouth. " Networking effects are extremely difficult to break. Also - brand power is stronger than you'd imagine. Coca Cola is not better than many other colas. Taste tests confirm this. Yet coke and pepsi have a 'brand duopoly' on colas. Cola should be a commodity, like water, but no, it's a weird duopoly/oligarchy. Aside from brand, and networking effects - there is usage history etc. - Facebook also has all of your social history. Facebook does exhibit many monopolistic advantages, as does Google.