@TNM
I got a response from BalletCrypto
The top 100 coins on coinmarketcap are of priority when we consider which coins to add to our wallets. Sometimes there are smaller community such as raven coin or conflux who want to collab with us, then we might do a joint project based on our evaluation of their credibility and popularity. Conflux is very popular in China and our team believes this will be a successful project , hence the conflux wallet
So, it looks like they work on adding the top coins and also then work with community projects that reach out for a collaborative project. It also appears that Conflux is very popular in China.