I've been a fan of COSS for a while due to it's fee split allocation where holders of COSS get 50% of the fees generated by the exchange. But the real appeal was the FIAT to Crypto gateway. This would allow directly buying altcoins without buying BTC or ETH first. Not only would this reduce some of the fees I have to pay but this would be a big step in decoupling altcoins from BTC. For a while now altcoins have been coupled very tightly to BTC so when BTC goes down alts go down - when BTC goes up...alts also go down. We only really see a rise in altcoin prices when BTC goes sideways due to how tightly they are coupled to BTC. So FIAT gateway has a lot of uses and advantages and COSS was the front runner for implementing FIAT to crypto gateways - this would also count towards fee split allocations increasing the amount each COSS coin earns per week.
Binance has recently announced FIAT to crypto. Binance is a giant and has done a lot of things correctly and has a lot more capital to implement this functionality quickly. There is a lot of money in exchanges and there's is room for multiple exchanges but first to marked is COSS's chance to make their mark. I think they can still be successful if they come second but I think they will be missing their opportunity to become a major exchange. For now I will continue to hold COSS because I think there are still enough opportunities for them but I don't think they are making the all of the strides that they need to be making in order to be a major exchange like Binance or Coinbase.