Facebook isn't a real monopoly unless you consider "social network" a real product.

But in reality "social network" as a product is a bit thin, since it's really just a crossover of blogging and communication.

There's nothing of value that facebook does which the general populace can't replace with something else within a week.

People won't run out of ways to communicate with each other, and they won't run out of ways to shout and throw pictures into the void.

In fact people used to change platforms like clothes and the continued dominance of facebook in a lot of countries is a bit of an anomaly.

Also only about 50% of Australians even are on Facebook, which is slightly more than Europeans, but way less than north Americans.