The MIT Entrepreneur course on EdX also mentioned dominating a beachhead market. Their definition is, "A beachhead market is the place where, once you gain a dominant market share, you will have the strength to attack adjacent markets with different opportunities, building a larger company with each new following" [1].

Nice to see an example of that in real life. Did Buildium eventually target adjacent or new markets?

[1] https://executive.mit.edu/blog/launching-a-successful-start-...