Some random researches with no solid background on this fit a fairly flexible curve to data and people go mad? Just looking at simple principles falsifies this

Some random researches with no solid background on this fit a fairly flexible curve to data and people go mad? Just looking at simple principles falsifies this: Facebook's older public is quite solidified, there's so much built on top of it, etc. Myspace didn't have to enormous infrastructure or the general social network outlook we currently have. Even by pure inertia it'd say it would take more than 5 years for FB to loose 80% of it's users, even if a really promising competitor emerged.