I personally think that Leofinance has reached so high because it targeted a niche audience rather than a mass. Anybody who is joining leo finance and is an active member, there's a reason that he is interested in finance and either has something in the context to share or is willing to learn. Both ways, he is able to add a lot of value to the community and hence the growth.
We have to agree that the growth of any community is attributed to its people. Better they perform and engage, more growth the community witnesses.
I will NOT upvote this comment because of this:

See more details here:
https://www.proofofbrain.io/hive-150329/@onealfa/news-on-my-curation