As you may or may not know, Kin forked Stellar's blockchain code as they ran into a few issues revolving around scaling to what they need in the near future. One of these issues was the need for lumens during wallet creation which would be very costly for Kik to cover for it's millions of users and also left the door open for malicious wallet creation. Another issue was it's transaction cap. Stellar is capable of processing many more transactions per second that it currently allows, but to combat spam they've implemented an arbitrary cap. This set's the ceiling at 10tx/s (transactions per second). It's likely the case that Stellar will increase this number themselves, but KIN will need it sooner than Stellar will make these changes, if they do. Running on a forked version of Stellar, they now have full control to make those adjustments at their own will.

Kin's initial test on the public Stellar testnet:

Daily Transactions: 220,000
Transactions per second: 3.6

Kin's initial test on the forked version of Stellar's blockchain (Kin Blockchain):

Daily Transactions: 470,000
Transactions per second: 8.3

Kin's 2nd test on the Kin Blockchain (increasing the amounts of users involved):

Daily Transactions: 1,200,000
Transactions per second: 20


Based on the last test results, the Kin Blockchain has proved it's scalability. It can successfully process 2x the transactions than the current Stellar blockchain (as-is) and can also process more transactions per second than Bitcoin (4-7tx/s) and Ethereum (13tx/s). Also keep in mind that when Bitcoin and Ethereum reach these kind of numbers they will experience extremely slow confirmation times and highly inflated fees. Kin will continue to push the limit of it's blockchain by increasing the number of users involved and ideally increasing the daily transactions and transactions per second even further.

Source: https://medium.com/inside-kin/scaling-kin-blockchain-status-update-ca4f323d3e99