Adaptation
This particular organism does so well because it is well adapted to live and thrive in many different climates. One way is in the basidiospores.
Picture by: Tom Volk
Basidiomycetes expel thousands and thousands of these basidospores. This increases the chances that at least one will germinate and form fruiting bodies.
Another way it adapts to the environment is in the number of genders in this fungus, over 28,000! This guarantees diversity in the genetics of this species.