So the innovation here is the dynamic interest rate. The way it works is that the interest rate scales according to network stake. If there's a higher amount of staked coins, the interest rate goes up. That means the more "invested" you are in the coin, the more interest you will make.
This essentially gives incentive for you to hold your coin in your wallet rather than keeping it on an exchange, gives you reason to tell your friends to acquire some coin and keep it staking, etc. because it helps both you and them. It's the only coin that provides additional reward for keeping the coin.
This part is good and got me interested. I am an investor, not a trader.
It also provides a reasonable interest rate compared to Blackcoin (1%) and other PoS coins (10%+ interest). Most stable economies have higher inflation than 1% so assuming the coin's value keeps steady it makes more sense to put it in FIAT and earn traditional interest. With the dynamic scaling interest rate, you're likely to make 2-2.5% interest which is much more in line with mature economies.
This part turned me off. Here's why:
Coin devs need to understand that 20% APR is not attractive for a long term investment, when MINT can lose/gain over 100% in one day.
We are NOT in real life. We are in Cryptoland. You don't expect the price of cookie to triple in one day (or even to goes up by 10%). Hence the low interest.
In Cryptoland, rules are different. Coins using real-life interests for crypto miss the point.
So, relaunch or clone with a higher stake, or just live your pump and dump life.