People like to see an application has a lot of good reviews and users to buy, so your growth is a percentage of your users.
It would be interesting to know when the number of users is increasing as a percentage or as a fixed number depending of the sector. Is there available data for the growth of users by sector/product/industry?
As new articles get on average very few comments don't expect people discussing old comments. Perhaps you can reformulate the content in a new setting and gain attention. With 10 million post in HN is no wonder millions are sleeping for ever.
The math doesn't sound realistic to me. He use a percentage for the churn rate but not a percentage for the number of new users, he is comparing an arithmetic progression with a geometric progression. As is well known, a geometric progression always beats an arithmetic progression.
The herd behaviour.
Word of mouth.
People like to see an application has a lot of good reviews and users to buy, so your growth is a percentage of your users.
It would be interesting to know when the number of users is increasing as a percentage or as a fixed number depending of the sector. Is there available data for the growth of users by sector/product/industry?