What about the site's rapid growth is the basis for your statement that "Whales dominating which content gets ranked is killing the site"?
Where is the data? We don't know which signups are unique people and not duplicate Sybils. We don't how many signups end up abandoned. It would help a lot if we had the raw data compiled. But how can we tell which accounts are Sybils?
We are also arguing the sustainable case, not the first few hype months case.