That being said, Yes the user would have to have accounts on these
exchanges to integrate in. We are exploring ways around this. We are also exploring ways to tie in order books with using recent new blockchain developments. This will ensure that in addition we will be able to provide substantial liquidity for many assets.
I assume it's not easy or it would expose CoinLion to the risk of holding BTC and ETH on those exchanges, but if you could manage it - or access the liquidity by other means - that would be exactly what crypto people need. Especially if you don't want to hold BTC and ETH on every exchange or if you have very few funds. Also it would probably attract professional arbitrageurs to the plattform and thus generate some volume.
Are you planning on adding only major crypto-fiat pairs or are you thinking about offering fiat pairs for smaller coins as well? I miss that a lot.